The lady was so absorbed in her job that she didn't hear a customer ________ at the door.A.to

题目简介

The lady was so absorbed in her job that she didn't hear a customer ________ at the door.A.to

题目详情

The lady was so absorbed in her job that she didn't hear a customer ________ at the door.
A.to knockB.knocking
C.be knockedD.knocked
题型:单选题难度:中档来源:不详

答案

B
答案:B 考查非谓语动词。句意:这位女士如此专注于她的工作以至于她没有听到有位顾客正在敲门。hear sb. doing sth.听到某人正在做某事。

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