20. He prefers ___ to school on foot rather than ___ the bus.

A. to go; to take　　　　 B. going; taking

C. to go; take　　　　　 D. go; take

19. Sorry, I forgot ___ the book to school.

A. bringing　　 B. to bring　　 C. taking　　　 D. to take

18. Can you ___ this difficulty?

A. get up　　 B. get into　　 C. get over　　 D. get to

17. He made a quick response ___ his mother’s question.

A. to　　　 B. for　　　 C. at　　 　D. as

16. This coat is expensive, ___, it’s worth it.

A. but　　　 B. however　　 C. although　　 D. as

15.(　　 ) ______ would you like to live in?

A. where　　　 B. which city　　 C. which　　　 D. when

14.(　　 ) Some robots are ______ to do the same things ______ people.

A . enough smart, as　　　　　　 B. enough smart, with

C. smart enough, as　　　　　　　 D. smart enough, for

13.(　　　 ) Scientists are now working ______ humanoids. Because they can help people a lot.

A. on　　　　　 B. against 　　　C. into　　　　 D. to

12.(　　 ) The play will ______ the cities next week.

A. tourist　　　　 B. touristy　　 C. tourism　　　 D. tour

11.(　　 ) They ______ all over the country. So they plan ______ some other country.

A.have traveled, visit　　　　　　 B. traveled, to visit

C. traveled, visiting　　　　　 D. have traveled, to travel