题目内容
The book was written in 1946, _____ the education system has witnessed great changes.
A.when | B.during which | C.since when | D.since then |
C
解析试题分析:
句意:这本书被写于1946年,自从那时起,教育体制就发生了巨大的改变。when引导的定语从句,在从句中作时间状语。后文用到完成时态,故用since when.
考点:非限定语从句
点评:本题极易选D. since then自从那时以来它不能引导定语从句,如果改为and since then即正确,本句since then只作时间状语,没有连词功能。定语从句都不缺主,宾语时用关系副词引导。
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