The article suggests that when a person______under unusual stress he should be especially careful to have a well-balanced diet.

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问题 The article suggests that when a person______under unusual stress he should be especially careful to have a well-balanced diet.

选项 A、is
B、were
C、be
D、was

答案A

解析 句意:这篇文章建议,当人在不寻常的压力下,应该特别注意饮食均衡。此处sug-gest引导的宾语从句本身是个时间状语从句,在这个时间状语从旬中,when引导的从句不用虚拟语气。
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