We don't doubt _____ he can do a good a good a good job about it.

We don't doubt _____ he can do a good a good a good job about it.
空格里是whether还是that?两种说法都有,麻烦给出详细解释.
英语人气:174 ℃时间:2020-02-27 14:01:11
优质解答
填 that.
如果用if,应该是 we doubt if he can.
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