20.The players from all over the world________ in the Olympics for the medals.

19.It’s_______of you to make such a decision in that situation.

18.The devotion to our motherland is deeply________ in the mind of every Chinese.

17.Living things need air and light_________ water.

16.No one knows when the lake_______.

14.This kind of bird is_________.

15The teacher_________ Tom spend more spare time on his lesson.

13.It’s hard to ______one twin______ another.

12.It’s our hope that two counties will live________ for ever.

11.When asked about his marks, he_______ silent.

10.He has a________ for running. No one can run faster than him.