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They multiplied and filled the oceans and seas with oxygen, _____ encouraged the later development of early shellfish and all sorts of fish.

A.that              B.where            C.when             D.which

 

【答案】

D

【解析】

试题分析:考查非限制性定语从句。本题是一个非限制性定语从句,which指代前面一句话的内容,在定语从句中做主语。Where和when在句中做状语,不能做主语。That不能引导非限制性定语从句。故D正确。

考点:考查非限制性定语从句

点评:非限定性定语从句起补充说明作用,缺少也不会影响全句的理解,在非限定性定语从句的前面往往有逗号隔开,如若将非限定性定语从句放在句子中间,起前后都需要用逗号隔开。需要注意 which引导的非限定性定语从句是用来说明前面整个句子的情况或主句的某一部分。 在非限定性定语从句中,关系词不能用that。

 

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