虽然我们花了两个晚上来解决这个问题,但是仍没有找到解决的办法.
solving
spend+一段时间+(in) doing sth.花了一段时间做某事
though we have spent two nights in the problem,we still can't find a solution.
though we have spent two nights in the problem,we still can't find a solution.
填空,在in 后面
填空,在in 后面
英语人气：704 ℃时间：2020-03-25 02:06:54
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