问题
选择题
I wouldn't manage to do it___ you had explained how.
A．unless
B．until
C．when
D．since
答案
答案：A
句意是：如果你不解释，我就会没法做了。
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I wouldn't manage to do it___ you had explained how.
A．unless
B．until
C．when
D．since
答案：A
句意是：如果你不解释，我就会没法做了。