_________ people were watching the sky, the alien got out of the UFO.A.IfB.WhenC.BecauseD.While-八年级英

题目简介

_________ people were watching the sky, the alien got out of the UFO.A.IfB.WhenC.BecauseD.While-八年级英

题目详情

_________ people were watching the sky, the alien got out of the UFO.
A.IfB.WhenC.BecauseD.While
题型:单选题难度:中档来源:不详

答案

D
while引导的时间状语从句常用进行时态.

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