Dr.Liwasso________lookingattheIn

发布时间：2020-07-26 16:34:10

Dr. Li was so ________ looking at the Internet that he forgot the time.A.carefullyB.carefulC.busilyD.busy

网友回答

D解析此题考查词汇的用法。be busy doing sth. 意为“忙于做某事”。
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