问题
选择题
It is required that each of the students chosen _____ good preparations ahead of time.
A．has to make
B．will make
C．should make
D．must make
答案
答案：C
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It is required that each of the students chosen _____ good preparations ahead of time.
A．has to make
B．will make
C．should make
D．must make
答案：C
