We should return the books to the library ____time.
A. about B. on C. by D. for
---Carl, why not go and help your sister water the flowers there?
---Why__________? I’m busy myself. Jack is lying on the grass doing nothing.
A. me B. I C. him D. he
---___________ is it from here to Yancheng Railway Station?
---About two kilometers.
A. How often B. How far C. How soon D. How long
We all __________how he made such great progress in a short time.
A. believed B. thought C. decided D. wondered
---I think Miss Gao must be in the library. She said she would go there.
---No, she ___________ be there. I have just been there.
A. can’t B. mustn’t C. needn’t D. wouldn’t
The world’s population is getting larger and larger, so scientists will have to ______ new ways to solve food problem.
A. catch up with B. keep up with C. come up with D. make up with
