When a student asks it is worth staying up doing their lessons, a teacher may find it difficult to a...
2023-01-05 11:36:04 38次 湖南省高考适应性测试英语 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
When a student asks it
is worth staying up doing their lessons, a teacher may find it difficult to
answer.
A.
that B.
what C.
whether D.
how
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