The hole in the stratospheric ozone layer over Antarctica did not grow as fast t

游客2024-08-31 33

问题 The hole in the stratospheric ozone layer over Antarctica did not grow as fast this year ________on average between 1991 and 2006.

选项 A、as it
B、as that
C、as that did
D、as it did

答案 B

解析虚拟语气题。破折号前为主句，破折号后为whether…or…引导的让步状语从句。whether…or…引导的让步状语从句使用虚拟语气时，谓语动词用原形。故B为答案。

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TheholeinthestratosphericozonelayeroverAntarcticadidnotgrowasfastt