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is known to us all is that there have been five cases of A influenza on the main

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is known to us all is that there have been five cases of A influenza on the main

_______ 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

试题答案

D