The Silk Road was a network of trade routes     1    (connect) China and the Far East with the Middle East and Europe.     2    (establish) when the Han Dynasty in China     3    (official) opened trade with the West in 130 BCE, the Silk Road routes remained     4     use until 1453 CE, when the Ottoman Empire boycotted (抵制) trade with China and closed them. Although it’s been nearly 600 years since the Silk Road     5    (use) for international trade, the routes had a lasting impact on commerce, culture and history that resonates even today.

The Silk Road may have formally opened up trade between the Far East     6     Europe during the Han Dynasty,     7     ruled China from 206 BCE to 220 CE. Han Emperor Wu sent imperial ambassador Zhang Qian     8    (make) contact with cultures in Central Asia in 138 BCE, and his reports from his journeys conveyed valuable     9    (inform) about the people and lands that lay to the West. But the transport of goods and services along these routes     10    (date) back even further.

After arriving at Merzouga, we entered the Sahara in which we saw     1     sand dunes. The sun was     2    , and the sky was     3    . There was not a     4    . The desert seemed completely empty. Before dark, we returned to our     5    . Our car was once     6     the mud during the trip. We saw the     7     mountain in Africa. There were tall     8    , trees and animals like giraffes and elephants on the     9    . Finally, we got out of the car and took our     10     into the hut.

Pearl Harbor is a U.S.naval base near Honolulu, Hawaii, which was     1    scene of a destructive surprise attack by Japanese forces     2    December 7, 1941.Just before 8 a.m.that Sunday morning, hundreds of Japanese fighter planes attacked on the base,     3    they managed to destroy or damage nearly 20 American naval ships,     4    (include) eight battleships, and over 180 airplanes.More than 2,000 Americans     5    (die)in the attack, including common people, and another 1,000 people     6    (wound).The day after the attack, President Franklin D.Roosevelt asked Congress     7     (declare) war on Japan. 

During the Pearl Harbor Attack in 1941 the USS Arizona sank with a     8     (lose) of more than 1,000 men.A white concrete and steel structure now spans the remains of the     9    (sink) ship, which was dedicated as a     10    (nation) memorial on May 30, 1962.Present facilities at Pearl Harbor include a naval shipyard, supply centre, and submarine base.

VR (virtual reality), just like its name,     1    (mean) reality that is not real. Though you know the sensory information    2    (surround) you is not real, part of your brain believes it is and acts     3    (according). VR can be used in many fields, education, for example. It helps students understand many complex situations such as the universe     4     micro world. In medicine, VR can help surgeons practice operating on a virtual “twin” before operating     5     the real person. It can also help train new surgeons.

VR has a     6    (vary) of applications in our daily life. Some game systems allow players     7    (put) on a special headset and they will enter virtual environments and play against either real or virtual     8    (opponent). VR is being introduced to help people see exhibitions in museums, do shopping and selecting travel destinations. In either case, VR will help people make more     9    (inform) choices.   

Though there are some barriers for the development of VR, it is promising. Especially during this age     10     technology is developing fast, everything is possible.

The passage is mainly about the     1    (different) between Alan’s life before and after he stopped     2    (use) his smartphone. Alan was a smartphone addict,     3     spent too much time     4     the phone. Then an accidental incident     5     (make) him want to live without a smartphone for a week.   At first he felt     6     (lose) and anxious. As time passed, he felt free and     7    (alive) than before and began     8     (appreciate) the beauty in life with     9     own eyes instead of through his camera.     10    (final), it dawned on him that life beyond smartphones is richer and more beautiful.

Scientists       1    (study) gene technology for decades, and although great progress       2    (make), many difficult problems remain unsolved.   We human beings     3    (find) ways to cure various diseases. Although many ways     4    (find) to cure lots of diseases, there are still many that cannot be cured, such as cancer. We     5    (search) for the secret of longevity, and even though people     6    (be) able to live longer than ever before, we still hope it even longer.