2 . It was required________ we________ at least another two experiments to make sure th machine function well.

A．l; did	B．that; do
C．that; did	D．should do

5 . 下面每个句子都只有一处语言错误。每处错误仅涉及一个单词的增加、删除或修改。多改或不按格式要求改不得分。   
增加：在缺词处加一个漏字符号（^），并在其下面写出该词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下面划一横线，并在该词下面写出修改后的词。
1. If he will be invited to the meeting is not known.
2. The scientists all agreed that the rules of physics, for which we are all familiar, govern the world.
3. A great many of people gain a great deal of information from the Internet.
4. It is recommended that you took a shower the night before the operation.
5. As is apparent shown in the chart above, there are about 10% students supporting the idea .
6. You have much experience in voluntary work so that I find it a good idea for you to apply the position .
7. A good idea was occurred to him when he was asked to solve the problem.
8. I had a bad cold; therefore I would have visited more experts last week .
9. He told me that it was the first time that he has come late for such am important lecture.
10. There is no help for those with lots of luggages and small children.