题目内容

Li Ling was a diligent boy . He ____ go to school though it was raining hard .
A.was able toB.couldC.couldn''tD.wasn''t able to
A。
表示过去“能够”,肯定句只用 was able to , 不用 could。而 couldn''t 与 wasn''t able to 在语言逻辑上都不妥。
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