题目内容
12.Researchers have come to the conclusion over the last 5years ____ teens need to sleep until about 8:00the next morning.( )A. | when | B. | what | C. | whether | D. | that |
分析 研究人员在过去的5年已经得出结论,青少年需要睡到第二天早上8:00.
解答 答案:D.根据 teens need to sleep until about 8:00the next morning可知整句是对前面 the conclusion 的补充说明,是同位语从句,不缺成分,故选D.
点评 本题考查同位语从句,在熟知同位语从句连接词及充分分析句型基础上便能选出正确答案.
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