问题
选择题
The woman was about to open the door _______ she heard a strange sound from inside.
A．as
B．while
C．when
D．then
答案
答案：C
本题考查连词。句意：那位妇女正要开门,这时她听见里面有奇怪的响声。be about to do..when.. 刚要做……正在这时……。
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