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It is these poisonous products can cause the symptoms of the flu, such as headac

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It is these poisonous products can cause the symptoms of the flu, such as headac

It is these poisonous products ________ can cause the symptoms of theflu, such as headache and aching muscles.

A. who

B. that

C. how

D. what

 

试题答案

答案：B

解析：

强调句型。

 

标签：causecantheofsymptoms

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