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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 the flu, such as headache and aching muscles．

[]A．

who

B．

that

C．

how

D．

what

试题答案

答案：B

解析：

本句是强调句结构。其句型如下：It is/was＋被强调部分＋that＋其他句子成分。被强调部分可以是句子的主语、宾语或状语。被强调部分如果表示人，作主语还可以用who连接(作宾语可以用who或whom连接)。

标签：causecantheofsymptoms

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