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