I stayed up late doing my homework yesterday,so I had trouble___up early this morning.
A.getting B.to get 为什么选A不选B?
人气：465 ℃ 时间：2020-05-12 16:01:48
解答
句子的 doing 是现在分词（Present Participle）(又称-ing形式）
是固定用法.其他类似例子
SINGING well is not easy.
HAVING finished,he went home.
I enjoy EATING mango.
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