1 . This is ________ my father has taught me—to always face difficulties and hope for the best. (用适当的词填空)

2 . Learning a foreign language, believe it or not, is ________ can change you for the better.（用适当的词填空）

3 . The reason why he hasn’t come is ________ his mother is ill. (用适当的词填空)

4 . The problem is ________ can take the place of her. (用适当的词填空)

5 . The most pleasant thing of the rainy season is __________ one can be entirely free from dust.

6 . The reason why he failed is_________he was too careless.

A．because

B．that

C．for

D．because of

7 . Is this______we met them last night?

A．where

B．place

C．place in which

D．place which

8 . Although a number of tombs have survived with little damage,the truth is__________all have suffered at least some harm from centuries of rain,war,fire and theft. (用适当的词填空)

9 . The beautiful view of the city is ___________ attracts me most. (用适当的单词填空)

10 . What she couldn’t understand was _____ fewer and fewer students showed interest in her lessons.

A．why

B．what

C．which

D．how