1. You have made a few mistakes in the course of the experiment but ______ you have done well.

A. on the whole　　 B. as a whole

C. in whole　　　　　　 D. wholly

[解析]选A。句意：实验过程中，你有几处错误，但总的来说你做得很好。as a whole 着重从整体上看问题而不是将事情分开考虑；on the whole表示“大体上”，并非百分之百的意思；in whole全部；wholly 完整地，整个地。

10. It took the police about two years and three months to look into the complex(复杂的) case.

9. Try to simplify(简化) your explanation for the children.

8. Whatever I suggested, they would go and do the opposite(相反).

7. The water is so clear that it reflects(映射) the surrounding mountains.

6. How many new Chinese characters(文字) are there in the passage?

5. A red sky at night indicates (表明) fine weather the following day.

4. Mr. Wu worked so hard while rescuing people that he eventually　 (最终) fell to the ground, dead.

3. Originally (起初)，people trained dogs just for racing.

2. You must judge a person by his actions (行动)，not by what he says.