1 . Tom was absent-minded in class and that was_____ he couldn’t answer the teacher’s question.

A．how

B．when

C．where

D．why

2 . We are afraid of making mistakes when learning a foreign language, and that is________we are quiet in our English classes.

A．what

B．because

C．whether

D．why

3 . _____ bothered me most was ________ I should choose as my partner in the competition.

A．What; that

B．Which; that

C．It; who

D．What; who

4 . The rituals of coming-of-age ceremonies are diverse. But one thing ________ all coming-of-age ceremonies have in common is ________ they prepare a young person to take on responsibilities as an adult.

A．what; that

B．that; that

C．what; whether

D．that; what

5 . During my trip to Guilin, ________ impressed me most was ________ the view was really breathtaking there.

A．that; what

B．that; because

C．what; that

D．what; because

6 . We don’t approve of the way _________ she brings up her children. Is that also _________ you disagree?

A．in which; what	B．that; how
C．which; why	D．不填; where

7 . People go for walks less and prefer quiet rest at home. That’s ________ there are marathons and other sports events aimed at encouraging people to move more. （用适当的词填空）

8 . The greatest mystery of all is ________ caused the Maya to abandon most of their great cities.

A．what

B．where

C．when

D．which

9 . It was widely confirmed by scientists that that was exactly ________ global greenhouse gas emission needs to be addressed as soon as possible.

A．why

B．how

C．when

D．whether

10 . You can tell a lot about a person by the food he consumes—as the old saying goes, you are ________ you eat.

A．when

B．where

C．what

D．which