In hot summer, milk quickly turns sour it is refrigerated.A. whileB. ifC. untilD. unless

发布时间:2020-08-17 01:37:06

In hot summer, milk quickly turns sour      it is refrigerated.
A. while
B. if
C. until
D. unless

网友回答

A. while
B. if
C. until
(答案→)D. unless
解析:考查连词,A. while当…时候B. if如果C. until直到…D. unless除非,引导条件状语从句,句子意思“在炎热的夏季,牛奶很快变酸除非被冷藏”
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