2. He asked _________ I was new here.

　　　 A. that　 B. when　 C. whether　 D. how

1. We don’t know _______________.

A. how should we do it　　　　 B. how to do it

C. what should we do it　　　　 D. what to do it.

5. ________ you __________ what we can do on Hainan Island yet ?

4. It _________ that he comes from American.

3. We ______________where to spend our holidays at the moment.

2. They _____________ on their way to school yesterday.

( think about, find out,　 feed on , take part in, be said, have an accident )

1. Many sharks ___　 ___ other sea animals, and sometimes they eat people.

9.　　　 Have you ever r_______ a horse? No, never.

8.　　　 Cousteau made it possible by i_______ the scuba machine.

7.　　　 Water is very important for China. H_______, many people pollute lakes and rivers.