It was just at the moment __________he worked out the problem that he had lon...

作者: tihaiku 人气: - 评论: 0
问题 It was just at the moment __________he worked out the problem that he had long been puzzled about.
选项 A.since B.Which C.because D.that
答案 D
解析 考查强调句。本句去掉Itwas和空格处,剩下的句子经过调整语序后变成Heworked out the problem that he had long been puzzled about at the moment.仍是一个完整的句子,所以该句是强调旬。强调句的结构为“It is/was+被强调部分+that+其他成分”。第二个that引导的是定语从旬,修饰先行词problem。
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