1 . Going to the dentist's ________ not necessarily have to be ________ awful experience.

A．do; an

B．does; the

C．do; /

D．does; an

2 . 根据句意，选择单词或短语并以其适当形式填空。

A. leave out        B. arise from        C. broke down       D. set foot on        E. knock over

1. It was the first time I had ________ African soil.
2. Be careful not to ________ the flower vase.
3. Talks with business leaders ________ last night.
4. Emotional or mental problems can ________ a physical cause.
5. You can ________ the third sentence to make the essay shorter.