题目内容
The H1N1 flu spread very quickly at the beginning, __________, many people were ill.
A.therefore | B.instead | C.in advance | D.however |
A
解析
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题目内容
The H1N1 flu spread very quickly at the beginning, __________, many people were ill.
A.therefore | B.instead | C.in advance | D.however |
A
解析