问题
选择题
It’s no long a question now ____men can land on the moon.
A．that
B．which
C．whether
D．what
答案
答案：A
It在句子中作形式主语，that引导的从句充当真正主语。
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It’s no long a question now ____men can land on the moon.
A．that
B．which
C．whether
D．what
答案：A
It在句子中作形式主语，that引导的从句充当真正主语。