It is these poisonous productscan cause the symptoms of the flu , such as headache and ach

发布时间：2020-08-17 13:24:51

It is these poisonous products    can cause the symptoms of the flu , such as headache and aching muscles .
A. who
B. that
C. how
D. what

网友回答

A. who
(答案→)B. that
C. how
D. what
解析：句意：正是这些有毒物质能够产生流感征兆，如头疼、肌肉疼痛等。该题考查强调句型，强调主语。把it is…that 去掉后，句子仍然完整。
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