______alittleearlier,Iwouldhavecaughtthetrain.
A、DidIleaveC
本题考查的是 if 引导的虚拟条件句，省略了 if 要把 had 提前。
Chinaisamountainouscountry.Hills,mountains,andplateauscover_______ofthetotalarea.
Thepolicemancameuptothelonelyhousewiththedoor_______,_______thereforawhileandthenenteredit.
WhichofthefolloingisNOTincludedinthefabledFiveMountainsinChina?
In1995,anaverageof_______ofdomestictravelerswentonsightseeinginChina.
______thenewplancanbecarriedoutwillbediscussedatthemeetingtomorrow.
