【推荐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。

Herds of elephants used to live on the plains of Africa and in the forests of Asia. But today, hunters are a serious danger     1     them.     2     large amount of cruel hunting has contributed     3     the dramatic     4     (reduce) of these large animals. To save them, some     5     (reserve) have been established where they can live in peace and safety. Moreover, many people are devoted to     6     (protect) them. However, the     7     (cruel) on them will continue as long as interest in buying elephant products     8     (permit). To make humans and animals live in harmony, it is urged that measures     9     (take) to protect these beautiful creatures from     10     (extinct).

【推荐2】Directions: After reading the passage below, fill in the blanks to make the passage coherent and grammatically correct. For the blanks with a given word, fill in each blank with the proper form of the given word; for the other blanks, use one word that best fits each blank.

Can Indoor Plants Really Purify the Air?

Plants are very important to human life. Through photosynthesis (光合作用), they transform carbon dioxide into fresh oxygen. They     1    (assume) to remove toxins from the air we breathe—but is this true?

One famous NASA experiment, published in 1989, has found indoor plants can clean the air by removing pollutants     2    (cause) cancer. Later research has found soil micro-organisms in the potted plant also     3    (play) a part in cleaning indoor air.

Based on this research, some scientists say house plants are effective natural air purifiers, and the bigger and leafier the plant, the better. The amount of leaf surface area influences the rate of air purification.     4    , however, say the evidence that plants can effectively accomplish this feat (功绩) is far from conclusive.

“There are no definitive studies to show that having indoor plants can significantly increase the air quality in your home,”     5    Luz Claudio, a professor of environmental medicine and public health. “There’s no question     6    plants are capable of removing volatile (易挥发的) chemical toxins from the air under laboratory conditions,” says Claudio. But in your home or office space, the notion that putting a few plants together can purify your air doesn’t have much hard science     7    (back) it up.

Most research efforts to date, including the NASA study, placed indoor plants in small,     8    (seal) environments to assess how much air-purifying power they have. “But those studies aren’t really applicable to what happens in a house. In many cases, the air in your home completely turns over—that is, exchanges places with outdoor air—once every hour. In most instances, air exchange with the outside has a     9    (great) effect on indoor air quality than plants.” says Stanley Kays, a professor of horticulture (园艺学).

Disappointed     10    many people may be by what Kays said, the professor also made it clear that he believes house plants are beneficial. Studies have shown plants can knock out stress and make people feel happier. More research shows spending time around nature has a positive effect on a person’s mood and energy levels.

【推荐3】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。

Environment-friendly ideas have been created to supply people with helpful     1     (tip) on how they can help the environment     2     well as save money. I honestly believe that everyone wants to help the environment, even if they do or do not believe in     3    （globe）warming.

With power bills, water bills and all other expenses     4     (continue) to rise, it’s very hard for the average worker. No matter what your financial position is, there is always something everyone can do     5     (help) save our environment. We are not the only ones that live on this     6     (amaze) planet. We also share it     7     a wide range of strange and wonderful animals. It would be a great tragedy if they     8     (be) not around for our future generations to enjoy. Every little bit helps, so please do all     9     you can to protect our environment and the environment of these surprising animals.

I hope these environment-friendly ideas can help everyone to do     10     (they) bit for the environment and to make this world a better place.