_______ is known to all，China will be an _______ powerful country in 20 or 30 years’ time.
A、That；advancingC
as可以用來引導(dǎo)一個(gè)非限制性定語從句，通常無明顯的先行詞。as指代的是主句陳述的內(nèi)容。而as引導(dǎo)的從句既可以放于句首，也可以放于句末或句中。
The missing boys were last seen ________ near the river.
I ’ve got the order from the boss that the work _______ finished before 5 p.m. today.
You’d better leave things ________ if you don ’t know how to deal with them
This offer is ____ your reply reaching us before May 5th.
lt is n ecessary ___ you to comply with our shipp ing in structi ons.
