摘要：Children’s brains can’t develop properly they lack protein. A. when B. since C. because D. unless 选A.本题考查when的一个特殊用法.在本题中的when引导的是一个条件状语从句.相当于if.整个句子的意思是:如果孩子缺少蛋白质.大脑就不能正常发育.
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Children’s brains can’t develop properly_______ they lack protein(蛋白质).
A. when B. since C. because D. unless
查看习题详情和答案>>Children’s brains can’t develop properly_______ they lack protein(蛋白质).
A. when B. since C. because D. unless
查看习题详情和答案>>Children’s brains can’t develop properly_______ they lack protein(蛋白质).
A. when B. since C. because D. unless
查看习题详情和答案>>