9.　　 --Who had taken the book?　 --It was a m_________(谜).

8.　　 -- Have you r_________ the man?

-- Yes. We were in the same class only three years ago.

7.　　 Mother bought me a beautiful _________(钻石) n_______as my birthday present.

6.　　 Many people consider that it is not right to _____(克隆) a human being.

5. The director and the actors were _________(排练) the play again and again because they would ________(上演) it the next evening.

4.　　 She looks much p________ with red coats than blue ones.

3.　　 --Do you know the a________ of “Hamlet”?

--Yes, it’s written by Shakespeare.

2.　　 What other languages do you know b________ English?

1. We don’t understand the meaning of the sentences. So my teacher has e__________ them to us again and again.

20.　 What will you do at weekend? We will go ________(骑车).

Unit 15