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They made full use of the time they could ___ to do experiment.
填spare.
只知道spare time to do,求解释这里spare to do 是什么用法.
人气:253 ℃ 时间:2020-06-21 16:18:22
解答
they could spare应该是定语从句修饰the time,
后面的不定式应该是use的用法,use sth to do
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