2 . 他们在太空工作时,不得不将所有的东西都用胶带粘住,因为不这样的话,他们就会飘走。
Astronauts have to use tapes to stick everything down________ ________in space________everything would float off ________.

3 . 根据语境，选择下框中的单词或短语，必要时用正确的形式填空。框中有两个单词为多余单词。

sharp       hesitate       precious       otherwise       earn a living recycle       select       assist       carry on       indeed

1. During the gold rush, ________, some Chinese opened up shops and restaurants in Chinatown in San Francisco.
2. As the first woman ________ to make a trip into space, Tereshkova felt lucky and proud.
3. Despite the difficult situation, Dr Bethune did whatever he could ________ the Chinese people.
4. Astronauts have to use tape to stick everything down while working in space because everything would float off ________.
5. In space, astronauts collect all dirty water so that it can ________ for later use.
6. Many Americans complained about the ________ increase in the cost of health care and health insurance recently.
7. After ________ for several moments, Gary finally went into the expensive tailor’s shop and asked to see the suit in the window.
8. To a person nothing is ________ than their life.