_______isknowntousallisthattherehavebeenfivecasesofA(H1...

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_______isknowntousallisthattherehavebeenfivecasesofA(H1...

_______ is known to us all is that there have been five cases of A(H1NI) influenza on the mainland, two of whom have been cured.


A.It                            B.As                       C.That                       D.What

【回答】

D

知识点:主语从句

题型:选择题

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