It is necessary that he_____ the assignment without delay.(2010)A.hand inB.hands inC.must

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It is necessary that he_____ the assignment without delay.(2010)

A.hand in

B.hands in

C.must hand in

D.has to hand in

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。