Question

The book was written in 1946, _______ the education system has witnessed great changes. A．si..

The book was written in 1946, _______ the education system has witnessed great changes. A．since then B．when C．since when D．during which

Answer 1

C

试题分析：句意：那本书被写于1946年，自从那时以来教育体制见证了伟大的变化。因为逗号前后都是句子所以必须用连词，故排除A；这里是非限制性定语从句，先行词是1946，又根据谓语动词has witnessed可知，since与现在完成时连用，，故选C。 点评：本题难度适中。定语从句是高中阶段的重难点之一，需要考生有分析理解复杂的句子结构的能力，熟练掌握关系词的意义及句法功能。这里考生容易误选D。 即学即练: The Chinese government has made the Mid-Autumn Festival a legal holiday, ______ people will have a day off. A. when           B. which          C. where        D. what 解析：A。the Mid Autumn Festival为先行词，指时间在从句中作时间状语，因此引导词用when。