28. 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
科目:高中英语 来源:必修四全优设计英语北师版 北师版 题型:050
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