问题
选择题
It is an interesting story and one can't put it down _____ one has finished reading it.
A．after
B．when
C．since
D．until
答案
答案：D
考查固定句型. Not…until…直到…才…句意;这是一个有趣的故事，直到完全读完以后才能真正理解它的意思。
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