I have two grammars, ______are of great use.

A. all of which 　　 B. either of which

C. both of that 　　 D. both of which

This is the reason ______he didn't come to the meeting.

A. in which 　　 B. with which 　　 C. that　　 D. for which

Luckily some friends living locally came to visit me regularly and I went home every weekend, otherwise I ________ mad.

A. was going　 B. would go　 C. had gone　 D. would have gone

News came __________ the H1N1 virus may spread more quickly than was thought.

　 A．when　　　　 　 B．where　 　 C．which　　　 　 D．that

The World Trade Organization (WTO) finally opened its door to China on November 10, ______ our Chinese 15-year wait.

A. to end　　　　　　 B. ended C. ending　　　　　　 D. ends

I ________ sooner but I didn’t know that they were waiting for me.（ ）

A. had come　 B. was coming　　 C. would come　　 D. would have come

“I took part in the TOEFL. It was really hard.” “Did you ______ a lot?”

A. Have you studied                                   B. Did you study

C. Had you studied                                    D. Do you study

A cartoon series on Confucius was aired on TV, _____ the thinker was a 10-year-old boy, not an old man.

　 A. from which　　 B. in which　　 C. from it　　 D. in it

1.    Several _______(十年)have passed since I graduated from the college.

—Robert is indeed a wise man.

　 —Oh, yes. How often I have regretted ______ his advice!

A. to take　　　 　　B. taking　　　　 　 C. not to take　　　　 　 　D. not taking