A giant helium(氦) balloon is telling residents of Paris how good or bad the air quality is. When it’

题目简介

A giant helium(氦) balloon is telling residents of Paris how good or bad the air quality is. When it’

题目详情

A giant helium(氦) balloon is telling residents of Paris how good or bad the air quality is. When it’s good, the balloon ----measuring 22 meters wide and 32 meters high---shines green. _________, it’s red.
A.Though terribleB.Whenever good C.If worseD.When bad
题型:单选题难度:中档来源:不详

答案

D
考查状语从句的省略。根据句子,可知前后是对比相反情况,所以前面是When it’s good,,后面应是When it is bad,it is 可以省略,所以选D。

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