◎ 题干
It is 30 years _____ China performed the Reform and Opening-up policy _____ has had a great effect not
just on China, but also on the world.

A. that; since
B. since; 不填
C. when; that
D. since; that
◎ 答案
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◎ 解析
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◎ 知识点
    根据n多题专家分析,试题“It is 30 years _____ China performed the Reform and Opening-up policy _____ has had a great effect notjust on China, but also on the world. [ ]A. that; since …”主要考查了你对  【关系代词】【从属连词】【限制性定语从句】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。