Tom is addicted to the computer games,__his parents are worried about.a as b which

Tom is addicted to the computer games,__his parents are worried about.a as b which
Tom is addicted to the computer games,__his parents are worried about.a as b which

Tom is addicted to the computer games,__his parents are worried about.a as b which
which.as引导的定语从句应放在句首.

B.
这里考察非限定性定语从句，只能用which，which在此指代前面整个句子。
Tom对电脑游戏十分上瘾，他老爸老妈对这件事情十分担心as 不行吗？也可以引导非限制性定语从句呀？1.as做非限的话，一般是放置句首 2.as 代表前面的整个主句并在从句中作主语时，从句中的谓语必须是系动词；若为行为动词，则从句中的关系代词只能用which。 3.as它自己本身有意思，是...

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B.
这里考察非限定性定语从句，只能用which，which在此指代前面整个句子。
Tom对电脑游戏十分上瘾，他老爸老妈对这件事情十分担心

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