20. Is it a wonder that 　　　　　little cells can store 　　　　　much energy?　

A. so; so　　　　　　　　　　 B. so; such　　　　　　　　 C. such; such　　　　　　 D. such; so

19. Will you see to 　　　　　that my birds are well looked after while I am away?　

A. them　　　　　　　　　 B. yourself　　　　　　　　 C. me　　　　　　　　　　　 D. it

18. --What does the model plane look like?

--Well, the wings of the plane are _____ of its body.

A. more than twice the length　　　　　　　　　　　　　 B. twice more than the length

C. more than the length twice　　　　　　　　　　　　 D. more twice than the length

17. --Have you seen Bob recently?

--No, but I was told he _______ for a new job all through the summer.

A. has been looking　 　 B. had been looking　　 C. is looking　　　　 　　　 D. was looking

16. -- Why isn't Cathy here yet?　　

-- She 　　　　　to be picked up at the station.

A. could wait　　　　 B. must wait　　　　　　 C. might be waiting　　　 　　　 D. can be waiting

15. I have no dreams 　　　　　to have a happy life.　

A. rather than　　　　 B. more than　　　　　 C. other than　　　　　 D. less than

14. --Good morning. How much should I pay for these books ________ to Alabama?

　 -- Hm, about ten dollars.

　 A. being sent　　　 　　 　B. to be sent 　　　　　 　　　 C. sent　　 　　　　　　　 D. having been sent

13. How long do you think _______ the computer company turns out a new product?

A. it will be that 　 　B. will it be until　　　 　　 C. will it be since　　　 　 　　 D. it will be before

12. --Mike, the telephone is ringing.

　 --I _________ answer it.

A. will　　 　　　　　　 　B. am going to　　 C. am to　　　 　 　　　 D. am about to

11. Lawrence Craven, a doctor from the USA, is the author of several published reports, one of _______ introduced the idea in 1953 _______ aspirin could reduce the risk of heart attacks.

A. them; when　 　　　 　B. which; that　　　 　　　 C. what; that　　　 　 D. which; when