问题
单项选择题
The meeting was just getting to the heart of the matter ( ) it's time to knock off.
A．while
B．when
C．until
D．after
答案
参考答案：B
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The meeting was just getting to the heart of the matter ( ) it's time to knock off.
A．while
B．when
C．until
D．after
参考答案：B