17.　 No one has seen a d______ though we often say it is the symbol of our Chinese people.

16.　 If you stay away from your family for a long time, you will be h______.

15.　 －What kind of film do you prefer, Little Tom?

－ I like c________ film the best because we can easily understand them.

13.　 The United States has sent up space s______but no other countries can do so now. 14.　 The teacher d_______ us into four groups.

12.　 Our plane was delayed for hours and the wait seemed e_______.

11.　 The football match between France and England in the Europe Cup was so exciting that it t______ all the people who watched it.

10.　 The tides(潮汐) are caused by the a_______(吸引力) of the moon for the earth.

9.　　 Stephen William Hawking is disabled, but he is a g_____ in the field of physics.

8.　　 Three people were trapped on the island. A ___(直升机) was sent to rescue them.

7.　　 It was the heavy rain that p_______ us from getting here in time.