问题
I had thought he would be nervous in this speech competition, but he turned out to be calm.— He_____ quite enough preparation for it. [ ]
A: should do
B: must do
C: should have done
D: must have done
B: must do
C: should have done
D: must have done
正确答案是：
同类题型
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What an unforgettable experience! I’ll write it down______it is till fresh in mymemory.
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