______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。
Whichofthefollowingisnotaninternationalvisitor?
Thegovernmentcalledoutpolicementosuppresstheriot.
Heshookhandswiththevisitors________astoconveyhisapology.
Astothevariouspollutions,whichofthefollowingisNOTtrue?
NeitherEnglishnorChinese________difficulttolearn.
