13. He is regarded ___ one of the best scientists in the world .

　A. for　 B. to　 C. as　 D. by

12. The whale is the biggest animal ___ sea .

　A. by　 B. at　 C. on　 D. under

11. He needs ___ five days to be in hospital .

　A. at least 　B. at first　 C. at last　 D. at once

10. It’s so kind ___ you to bring me the purse .

　A. for　 B. of　 C. to　 D. like

9. I felt ___ I was in the middle of the sea .

　A. as　 B. as if　 C. if　 D. at all

8. ___ is so important for him to heal the sick child .

　A. This　 B. That　 C. It　 D. What

7. I can’t make up my mind ___ her the news .

　A. tell　 B. to tell　 C. would tell　 D. telling

6. We’ll do what we can ___ English well this term .

　A. study　 B. to study　 C. be studied　 D. be studying

5. What are you going to do in the future ? I’d like to be a doctor ___ you are .

　A. so　 B. as　 C. what　 D. when

4. ___ is wrong to play tricks on other people .

　A. This　 B. That　 C. It　 D. One