问题
选择题
. He was just about to give up and return to his bedroom for a good rest ________ he had a bright idea.
A．but
B．while
C．until
D．when
答案
答案：D
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. He was just about to give up and return to his bedroom for a good rest ________ he had a bright idea.
A．but
B．while
C．until
D．when
答案：D