now more and more people are busy _________about the internet
now more and more people are busy _________about the internet
A learn B to learnC learningD learned
大概講一下，謝……
A learn B to learnC learningD learned
大概講一下，謝……
英語人氣：583 ℃時間：2019-12-10 11:39:39
優(yōu)質(zhì)解答
正確:C be busy doing忙于做某事
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