What we all work for is to free ________ time for the things we really want to doA.off B.up C.aside

What we all work for is to free ________ time for the things we really want to doA.off B.up C.aside

题目
What we all work for is to free ________ time for the things we really want to doA.off B.up C.aside D.in
选哪个,为什么
答案
B正确.
free up 释放……出来以便用于.up可以省略.
例如:
Can you cancel my meeting --- I need to free up the afternoon to write this report.
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