问题
选择题
The professor requested that all the students ________ the reports at once.
A．would hand in
B．handed in
C．hand in
D．handing in
答案
答案：C
C [考查语态。request 作为动词，后接宾语从句时，谓语动词用should＋动词原形，should可以省略。]
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