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A. in, in, at B. in, at, in
C. at, in, at D. at, at, in
They are going to work ______ the wall newspaper （报纸） tomorrow.
A. at B. for C. in D. of
The students are doing well ______ English.
A. at B. in C. for D. on
The great scientist （科学家） worked ______ the problem （问题） for a few days and at last he worked it ______.
A. out, on B. on, out C. out, out D. on, on
She ______ a pen and began ______ her lessons.
A. take out, to do B. takes out, doing
C. took out, to do D. took out, does
"You ______ talk here," the assistant (助手) ______ the library (图书馆)says to the students.
A. mustn't, at B. can't, for
C. don't, with D. needn't, in
You ______ write a littler to Li Ping. He is going to be here this afternoon.
A. can't B. may not C. mustn't D. needn't
"You ______ get up at six tomorrow," the teacher says.
A. have B. must C. could D. had to
She ______ to do some washing the day after tomorrow.
A. going B. doesn't go C. goes D. is going
I met an old friend of ______, I stopped ______ to him.
A. mine, talking B. mine, to talk
C. my, to work D. my, talking