单选题：The 25 trials involved roughly the same number of participan

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题目内容：
The 25 trials involved roughly the same number of participants. A．Right
B．Wrong
C．Not mentioned

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The doctor's pills worked marvels for me.

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I bring some information as regard other companies.

I bring some information as regard other companies.A．at B．with C．from D．about

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What is Belcher's team doing at present?A．It is finding ways to get rid of virus

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One of the sleep problems is waking in the middle of the nig

One of the sleep problems is waking in the middle of the night, unable to ______

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