1 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

AIDS is caused by a virus called HIV. The immune system of those who have AIDS     1     (become) so weak as to lose the ability to fight mild sicknesses. The virus is spread     2     three ways — it can be passed on through unprotected sex, through blood and from a mother to     3     (she) child. But HIV cannot be spread by     4     (mere) touching someone with AIDS. We should acquire more knowledge about AIDS, which has ruined many people’s lives. In an African village lives a boy named Ajani     5     mother has just died of AIDS, the same disease that took his father. Fortunately, he did not get HIV from his mother who had access     6     Prescription AIDS medicines when she was pregnant. Ajani wants to be a doctor when he grows up. He believes that education as well as medical treatment is the key to     7     (stop) the disease in the future. AIDS is not just     8     African problem but a serious problem around the world, including China. Something must     9     (do) to stop the disease. Chinese government has opened labs to monitor the disease.     10     (nation) help has also been very important, such as the United Nations. Let’s work together to end AIDS.

2 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

Willis Carrier     1     (design) the first air-conditioning unit in 1902, just a year after     2     (earn) his master's degree in engineering from Cornell University. At a Brooklyn printing plant, changes in heat and humidity (湿度) were causing the size of the printing paper to keep changing slightly, making     3     hard to arrange different colours. With Carrier's invention, temperature and humidity levels could     4     (control), so the problem was solved. The invention also allowed industries such as those of film, processed food, and textiles     5     (improve) the quality of their products.

In 1914, the first air conditioner was put in a private house. However, it took up too much space, and later models cost too much for most people. Cooling for human comfort, rather than industrial needs,     6     (actual) took off when three air conditioners were set up in the J.L. Hudson Department Store in Detroit, Michigan. People crowded into the shop to experience the new invention. The fashion spread from department stores to cinemas, whose income rose steeply (急剧地) as a result     7     the comfort they provided. According to research     8     (conduct) in the 1950s, air conditioning increased productivity amongst     9     (employee).

Jed Brown,     10     is an environmentalist, complains that air conditioning is a cause of global warming. However, he has to admit that it provides a healthier environment for many people in the heat of summer.

3 . — It’s good to see you again, Agnes.
— This has been our first chance to visit since you ________ (return) from Iran. （所给词的适当形式填空）

4 . Unfortunately, I lived over 250 kilometres from my parents’ house. If I ________ (not live) so far away, I _______ (visit) them more often. (所给词的适当形式填空)

5 . My current salary isn’t very high. I _________(am) able to afford to buy a house if I ________ (have) a job with a better salary. (所给词的适当形式填空)

6 . Running is popular ________ blind people, but many of them need a guide runner for support. （用适当的词填空）

7 . 阅读下面短文, 在空白处填入1个适当的单词或括号内单词的正确形式。

Yuan Longping,     1     (know) as the “world father of hybrid rice”, has won the life science section of the Future Science Prize, with two other scientists.

“There is no limit     2     scientific research, and I still have a dream     3     is hybrid rice going global and covering the whole world,” Yuan said in a video address at the award ceremony for the 2018 Future Science Prize in Beijing on Sunday. “I hope hybrid rice can be     4     (benefit) to people around the world and play a big role in     5     (enhance) world food security.”

Hybrid rice can feed an additional 70 million Chinese people every year,     6     (make) huge contributions to ending hunger in the country, Yuan said.

Yuan is a pioneer in hybrid rice research. He     7     (develop) the first hybrid rice in 1974.

The 88-year-old agricultural scientist shared the Life Science Prize along     8     Zhang Qifa and Li Jiayang for their pioneering work in breeding (培育) new rice    9     (vary) with high produce and better quality.

Touted (誉为) as “China’s Nobel Prize”, as both are privately funded, the Future Science Prize was instituted by a group of entrepreneurs (企业家) and scientists in 2016    10     (honor) top Chinese scientists in life science, physical science, mathematics and computer science.

8 . 阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式。

At the beginning of the 21st century, slow and often uncomfortable trains struggled wildly across China, with low average speeds making     1    (journey) such as Shanghai-Beijing a test of endurance.

Since 2008 China's high-speed rail industry has evolved rapidly and built the world's longest network, symbolizing the     2    (country) economic power and increasing prosperity. The network     3    (expect) to double in length again, to 70, 000 kilometers, by 2035. In addition, the Chinese have created a     4     (total) different picture of high-speed rail network,     5     often proves faster and more reliable than Chinese domestic flights.

Not satisfied with pushing the boundaries of speed and civil engineering, Chinese companies are among the first in the world     6    (introduce) new technology such as autonomous train operation and advanced signaling. Although its trains are     7     the world's fastest, China is still spending billions of dollars on maglev (磁悬浮列车). Hopefully, it won't be long     8     China operates passenger services well beyond the current limits of steel wheels.     9    (take) a typically realistic approach to raising the speed of land transport, China sees maglev as     10     better option for bridging the gap between rail and air on long distance routes.

9 . 阅读下面短文, 在空白处填入一个适当的单词或括号内单词的正确形式。

With so much food waste going to rot in landfills, a company     1    (call) Veles . wanted to repurpose those sugars and acids and turn them into something useful. Today, their all-purpose cleaner is made from food waste, along with a selection of     2    (natural) sourced fragrances — and lab tests show it to be effective 99% of the time at cleaning tough dirt from multiple     3     (surface).

The environmental benefits of the Veles cleaner go beyond just     4     (increase) the amount of food waste being recycled. It raises awareness of the benefits of bio-matter as a cleaning agent;     5    (reduce) a source of methane, a harmful greenhouse gas,     6     comes from food waste accumulating in landfills; and also removes the need for processed ingredients (原料)     7    (ship) to the Veles production facility from faraway places.

And more good news comes from the fact     8     they've designed their handsome spray bottle to be made of recyclable aluminum, and the company will soon be selling refills for it.

Like other products that are     9    (benefit) for the environment, Veles isn't cheap. It is available for $16. 00 on their website, but the refills will be selling for half     10     much— for all the customers who want to maximize the green potential of their dollars, and support small business innovation.

10 . 阅读下面短文, 在空白处填入1个适当的单词或括号内单词的正确形式。

China’s Chang’e-5 probe has collected moon samples, the China National Space Administration (CNSA) announced Wednesday. The lander-ascender     1     (combine) of Chang’e-5 has finished the tasks     2     moon sample drilling and packaging at 4:53 a. m. Wednesday. It is gathering samples from the surface as     3     (plan). After     4     (success) landing on the near side of the moon late Tuesday, the Chang’e-5 probe     5     (carry) out preparation work including unfolding solar wings. The probe     6     (adopt) two methods of moon sampling, including using drills     7     (collect) samples and     8     (gather) samples from the surface with a mechanical arm. The previous samples were taken from areas     9     the moon was believed to have stopped its volcanic activity about 3.5 billion years ago.     10     new theories believe that there could be some regions where lava could have formed more recently, like one to two billion years ago.