问题

The health official said ______ 12 suspected cases of influenza A (H1N1) were tested negative and ______, so far, this city has reported no case of the virus
A:what; that
B:that; what
C:不填; that
D:that; 不填
B:that; what
C:不填; that
D:that; 不填
正确答案是:
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