The students ________ their thanks to Professor Brown by preseting him with a gift.
A. revealed
B. expressed
C. showed
D. said
第3题
It is important_______there in time.
A. for you to get
B. to you to get
C. your getting
D. of you getting
第4题
You ______her at the beginning, but now it is too late.
A. ought to have refused
B. ought to refuse
C. ought have refused
D. needn’t refuse
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