________Danielwasworkingonthecompu

发布时间:2020-07-26 18:04:16

________ Daniel was working on the puter, Suzy was standing beside him.A.WhileB.WhenC.SinceD.Because

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A解析C、D明显不合句意:While和When皆为“当时”,但当强调两个动作同时进行时,则应用while。
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