6. _______ you have tried yourself can you learn what an exciting game it is!

A. Only if　 B. Even if

C. If only　 D. As if

5. Some children were seen _______in the garden all the morning. It must have been _______who picked the flowers.

A. playing; they B. to play; they

C. playing; them D. play; them

4. We allow_______ in the woods but anyone is forbidden _______here.

A. to camp; to smoke　 B. camping; smoking

C. to camp; smoking　 D. camping; to smoke

3. Doctor Wang_______ at seven o’clock for the conference, but she didn’t turn up.

A. should have arrived　 B. should arrive

C. should be arrived　　 D. should be arriving

2. Liu Xiang found himself _______ by reporters and his fans on his arrival at the airport.

A. surrounding　 B. surrounded

C. being surrounded　 D. to surround

从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。

1. - Sunny said you were crazy about basketball, really?

- Yes. And that’s why I join the volunteers for the Olympic Games and I really _______volunteering.

A. get hold of　 B. get along with

C. get away with　 D. get a kick out of

5. 他父母禁止他玩电脑游戏。

His parents _______ him_______ _______computer games.

4. 他逐题检查。

He_______　 _______the exercises one by one.

3. 我从游览了很多漂亮的地方和经历了不同的文化中得到了乐趣。

I have_______ _______ _______ _______ _______ visiting so many beautiful places and experiencing different cultures.

2. 无论谁违背这些规则都要受到惩罚。

Whoever_______ _______ _______ _______　 will be punished.