题目内容

8．Milk quickly goes bad in summer ____ it is in a fridge．（　　）
A．ifB．becauseC．unlessD．when

分析 除非将牛奶放在冰箱里，否则牛奶会在夏天迅速变质．

解答 答案：C．根据Milk quickly goes bad in summer和it is in a fridge的关系可知，牛奶会迅速变质，条件是不放在冰箱里；也就是说，除非将牛奶放在冰箱里，否则牛奶会在夏天迅速变质．unless表示"除非"的意思，相当于if…not"如果…不"．本句意思也可以翻译成：牛奶如果不放在冰箱里，就会迅速变质．故选C．

点评 做本题时，应注意前后句的关系，只有理清他们的关系，了解各个选项的意思，方能选出正确的答案．

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