_______ is known to all,China will be an _______ powerful country in 20 or 30 years’ time.【单选题】

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_______ is known to all,China will be an _______ powerful country in 20 or 30 years’ time.

A. That;advancing

B. This;advanced

C. As;advanced

D. It;advancing

参考答案:

C

as 可以用来引导一个非限制性定语从句,通常无明显的先行词。 as 指代的是主句陈述的内容。而 as 引导的从句既可以放于句首,也可以放于句末或句中。

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