It is necessary for students to take tests at monthly ______.

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问题 It is necessary for students to take tests at monthly ______.

选项 A、intervals
B、times
C、periods
D、terms

答案A

解析 本题考查的是名词用法辨析。intervals间隔:times次数;periods时期;terms期限。本句的意思是:“让学生们参加每月的考试很有必要。”应当是每月的间隔,故选A。
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