6．(　)A library with five thousand books ______ to the nation as a gift．

A．has offered　　　　　　　　　　　 B．is offered

C．have offered　　　　　　　　　　 D．are offered

5．(　)Not only ______ polluted but ______ crowded．

A．was the city．．． were the streets

B．the city was．．． were the streets

C．was the city．．． the streets were

D．the city was．．． the streets were

4．(　)You had a wonderful time on May Day, _______ you?

A．haven’t　　 B．didn’t　　　　　 C．hadn’t　　　　 D．will

3．(　)They found _______ very difficult to work out the problem．

A．this　　　　 B．that　　　　　　 C．it is　　　　　 D．it

2．(　)All ______ present and all _______ going on well．

A．is; is　　　 B．are; are　　　　 C．are; is　　　　 D．is; are

从A、B、C、D四个选项中选出可以填入空白处的最佳答案．

1．(　)The first two problems are very difficult, but the rest ______ easy．

A．are　　　　　 B．Is　　　　　　　 C．were　　　　　　 D．was

10．have后加yours。

9．去and。

8．great改为greater。

7．said改为saying，动词-ing 作伴随状语。