2. Quite ________　 the cost,we need to think about how much time the job will take.

1. He had his camera ready,just ________ he saw something that would make a good picture.

5. We are lucky to have such experienced,helpful and 　　　　(投入的，专注的)teachers in this school.

4. The courage Tom showed during the final part of the race was 　　　　　　(令人钦佩的).

3. He never complained about anything.He is always p　　　　 .

2. The villagers are determined to r　　　　 　their homes after they were destroyed by the recent flood.

1. Sang Lan had been a successful g　　　　 　before she was injured in an accident.

9. 解析:选C。由第一段可知，科学家使用了各种各样的方法。故选C。其他选项均与文意不符。

8. 解析:选C。由上句可知，此处指使用电脑监视，检查。

7. 解析:选A。由第一段的内容可知，讲的都是科学家所用的各种方法，所以用“how”,故选A。