1. (2021·南岗模拟) 阅读理解

As is known to all, without the earth's gravity (引力),nothing will come down to the earth and everything and everyone will fly in the sky. That is why many astronauts landing on the moon must work out the problems because of the low gravity.

Thanks to the international space station, we know quite a lot about the influences of low gravity on the human body, but NASA scientists want to learn more. So, they have been studying how other living things deal with low gravity, mainly focusing on mice. The results are both interesting and humorous. The scientists first sent some mice that were in the special cage to the international space station. The cage allowed them to study the behavior of the mice far away from the earth by video.

As you will notice in the video, the mice seem uncomfortable at the beginning of the experiment. They move around clumsily(笨拙地), drift in the small cage and do their best to figure out which side was up, but without success. However, it's not long before the mice seem to stop fighting. They became used to their new environment very well, and even put the lack (缺失)of gravity to good use and they push themselves around the cage. Soon they can move everywhere freely. The 11^th day of the experiment shows the mice are not just dealing with the gravity change, but actually seem to be enjoying it. Several of the mice are seen running around the cage walls. The scientists wanted to see whether the mice would continue doing the same kinds of activities they were seen doing on earth.

The study showed that the mice kept as normal activities as they did on the earth, including cleaning themselves and eating when hungry.

1. （1） We know __________________ at the beginning of the experiment.

   A . the mice felt comfortable in the new environment. B . the mice were not used to the low-gravity environment. C . the mice went out of their way to run out of the cage.
3. （2） The underlined word "drift" in the passage means "_________________" in Chinese.

   A . 漂移 B . 倒立 C . 躺下
5. （3） What did the scientists find about the mice from the experiment at last?

   A . They could only ate when hungry rather than clean themselves. B . They could hardly live in the new environment. C . They behaved as well as they were on Earth.
7. （4） Which of the following is NOT true according to the passage?

   A . The scientists first sent a mouse to the international space station. B . The mice remained in the international space station for eleven days. C . The mice seemed to enjoy themselves after getting used to the new environment.
9. （5） Which of the following can be the best title of the text?

   A . How animals deal with lack of gravity. B . Whether the earth has gravity or not. C . How mice get used to the new environment.