That is the day ______I'll never forget.

A. which 　　 B. on which 　　 C. in which 　　 D. when

By the time he was twelve he ______ a chemistry lab of his own.

A. built 　 B. has built　 C. had built 　 D. was building

The fact 　　　 Taiwan 　　　 to China is known to everyone in the world .

　 A. that ; is belonged 　　　　 B. which ; belongs

　 C. whether ; is belonging 　　 D. that ; belongs

It is worth considering what makes “convenience” foods so popular, and _______ better ones of your own.

　 A. introduces　　 B. to introduce　　 C. introducing　　 D. introduced

Only in this way　　　 to make improvement in the operating system.?

A.　you can hope　　　　　　　　　 B.　you did hope?

C.　can you hope　　　　　　　　　 D.　did you hope?

It’s said that he　　 because of his killing an old man.

A、has been held a prisoner　 B、has been taken a prisoner　　

C、was held prisoner　 D、was in prisoner

The revolutionary leader called on all people to________.?

A.prepare　　　　　　　　　　　　 B.be preparing?

C.prepare for　　　　　　　　　　 D.be prepared?

I don’t think Mary and Sue _____ before, ______?

　 A. have met; haven’t they 　 B. have met; have they

　 C. have seen; do I 　 D. have seen; don’t they

It is said that two man?made structures are clearly visible from space.One is the Great Wall of China,and　　　　 is Japan’s Kansai International Airport.

A.another　　　　　　 B.other　　　　　　 C.the other　　　　 D.either