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题目内容
（河南科技大学大学英语3(专升本)）
It is essential that the application form ______ before Friday morning.
选项:
A:shall be handed in
B:be handed in
C:will be handed in
D:must be handed in
选项:
A:shall be handed in
B:be handed in
C:will be handed in
D:must be handed in
参考答案
