______ a little earlier, I would have caught the train.
A、DidIleaveC
本題考查的是if引導的虛擬條件句，省略了if要把had提前。
WhichofthefollowingcountryisnotamemberofOECD?
WhichofthefollowingisnotmentionedasWTO'sobjective?
Asforfamilyeducation,parentsareencouragedtorelyon________ratherthanpunishment.
Pleasewriteareport________theabovesubjectsaretobecovered.
Thevolleyballmatchwastelevised________onCCTV.
