is known to everybody, the moon travels round the earth once every month. [ ] A.
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![is known to everybody, the moon travels round the earth once every month. [ ] A.](/pic/43_896749.jpg)
________ is known to everybody, the moon travels round the earth once every month.
[]A.It
B.As
C.That
D.What
试题答案
答案:B
提示:从第二句话可知,如果the moon前面有that的话,有可能是that引导主语从句,那么空格处就是it作形式主语,代替that引导的主语从句,反之,填as引导非限制性定语从句。 |