_______ is known to all，China will be an _______ powerful country in 20 or 30 years’ time.
正确答案： C
本题解析：
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。
What are the key features of a research paper?
What are the characteristics of good writings?
How many parts does a science and technology paper consist of? What are they?
How many forms can articles be roughly divided into?what are they?
How many parts is an article usually composed of? What are they?
What are the paragraph qualities?
句子写作：My presentation seemed to go well.
句子写作：The house ____is still standing.
句子写作：The judge had a hard time deciding___________________.
