Children’s brains cannot develop properly _________ they lack protein.A.becauseB
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Children’s brains cannot develop properly _________ they lack protein.A.because | B.since | C.when | D.unless |
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答案
C |
解析
试题分析:整个句子的意思是:如果孩子缺少蛋白质,他们的大脑就不能适当的发展。在本题中的when引导的是一个条件状语从句,相当于if。Because因为,since自从,因为,unless除非,所以选C。 |
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