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.

6 . Military helicopters dropped food and medicine to the earthquake survivors that remained out _______ in remote mountain villages. (用适当的词填空)

8 . 根据语境，选择下框中的单词，必要时用其正确的形式替换句中划线部分的单词，使之意思一致。

potential          circumstance          objective          encounter nevertheless        detect          acknowledge

1. There is little chance that we will succeed in changing the law. However, it is important that we try.
2. I did not admit that he had done anything wrong.
3. The company reserves the right to cancel this agreement in certain conditions.
4. We experienced a number of difficulties in the first week.
5. The European marketplace offers excellent possibility for increasing sales.
6. The tests are designed to discover the disease early.
7. The main purpose of this meeting is to give more information on our plans.

10 . 送奶工撞到石头，牛奶泼洒的到处都是。 (spill)
The milkman crashed into stone, ________.