It was 80 years before Christopher Columbus crossed the Atlantic Zheng sailed to East AfricaA．whenB．thatC．afterD．since 题目和参考答案——青夏教育精英家教网——

题目内容

It was 80 years before Christopher Columbus crossed the Atlantic______ Zheng sailed to East Africa

A．when

B．that

C．after

D．since

B

解析试题分析：考查强调句型。本题是强调句型，首先要知道强调句的结构It is/was+被强调部分+that/who+句子的其他成分，如果被强调的部分是人，可以用who代替that。具体是用is还是 was，要根据具体的时态确定。强调句的用法及判断：如果把句子中的It is/was…that去掉，稍加调整语序，能还原成完整的句子，并且句子意思依然完整，则为强调句型，否则为其他从句。我们应熟记这些基本规则。本句强调的是时间状语80 years before Christopher Columbus crossed the Atlantic。故B正确。
考点：考查强调句型
点评：能够准确把握句子结构是关键。随着高考考点的不断深入变化，该句型总是以新的面孔出现，或本身发生变化，或与其他句式结构相结合，然而万变不离其宗，总是脱不掉it，be，that/who这一框架结构。结合近几年有关高考题的特点，将其变化形式归纳如下：强调句型的一般疑问句形式。一. 句式特征：Is/ Was it +被强调部分+ that…；二、结合特殊疑问词构成特殊疑问句形式。句式特征：特殊疑问词+is/was it that…？三、强调句型的反意疑问句形式。句式特征为：It is/was+被强调部分+that…，isn’t / wasn’t it？四、强调句型的感叹句形式。句式特征为：what/ how … it is (that) +主语+谓语！

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