It is essential that he_____all the facts first.(2014)A.is examiningB.will examineC.examin

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It is essential that he_____all the facts first.(2014)

A.is examining

B.will examine

C.examines

D.examine

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_________。