问题
选择题
He waited until it was dark ____ nobody could see him clearly.
A．so that
B．in order to
C．although
D．however
答案
A
目的状语从句要用in order that或so that引导。
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He waited until it was dark ____ nobody could see him clearly.
A．so that
B．in order to
C．although
D．however
A
目的状语从句要用in order that或so that引导。