(   ) 13. When you read,don't      every new word in the dictionary. Try to guess its meaning.

A. give up    B. put up C. look for    D. look up

(   ) 12. --You look so young! How old are you?
一Aha! It's a      

A. suggestion B. reason    C. secret D. problem

(   ) 11. I find       necessary to learn about the customs of a country before you go there.

A. that    B. this C. it    D. one

express  discover  call  understand  quick

6. The girl      Annie is my pen pal.

7. My teacher spoke so       that I couldn't follow her.

8. We really need your help and      

9. We sent him some flowers as an      of thanks.

10. He jumped about in excitement at the       .

5. When he      (认识到，了解)what had happened, he was very sorry.

4. It is well known that Columbus      (发现)America in 1492.

3. Bob improves his English by doing      (语法)exercises.

2. Could you tell me your      (秘块)for a long happy life?

1. Do you know the most popular      (表达)in 2014?

20. 我看见一些孩子正在爬塔。

I saw some children                the tower.