8. He demanded that the laboratory report ___ immediately after the experiment was done.

A. was written B. be written C. must be written D. would be written

7. How I wish I ____ to reapair the watch! I only made it worse.

A. had tried B. hadn't tried C. have tried D. didn't try

6. Without electricity, human life _____ quite different today.

A. is　 B. will be　 C. would have been　 D. would be

5. Don't touch the sleeping tiger. If he woke up, he _____ you.

A. would attack　 B. should attack　 C. would have attacked　 D. will attack

4. If we arrived here ten minutes earlier, we ___ the bus.

A should have catch　 B. would have caught　 C. had caught　 D. would catch

3. The secretary suggested that they ____ the men in at once.

A. had brought B. should have brought C. brought D. bring

2. If you were old enough, I ____ you to go there yesterday.

A. will allow B. should allow C. would have allowed D. had allowed

1. The boy acted ____ he had never lived in Canada before.

A. as though B. even if C. as D. since　　　

100.B。

99.C。stop doing sth.意为“停止正在做的事”; stop to do sth.意为“停下来去做另外一件事”。此外,remember doing sth. 意为“记得做过某事” ;remember to do sth. 意为“记住要去做某事”。mean to do sth.意为“打算做某事”;mean doing sth. 意为“意味着……”。 regret to (say/tell you) sth. 意为“抱歉地(要说/告诉你)某事”; regret doing sth. 意为“后悔做了某事”。