---- Where is my reference book? It was here a moment ago.
---- Someone ______it by mistake
A. could have taken B. must take
C. may take D. must have taken
By next month he ______ in the big city for five years.
A. has worked B. has been working
C. works D. will have worked
______, he has much experience in learning English.
A. As is he young B. As he is young
C. As young he is D. Young as he is
You must have studied English for many years, ______ you?
A. didn’t B. haven’t
C. needn’t D. mustn’t
If I ______ you, I would give her a call.
A. am B. was
C. were D. should be
There are many people in the office, some ______ are English teachers.
A. of them B. from which
C. of who D. of whom
