请教这题选哪个?-You didn't invite Mary to the ball?...
问题描述:
请教这题选哪个?-You didn't invite Mary to the ball?...
请教这题选哪个?-You didn't invite Mary to the ball?-_her,too?A.Must I invite B.Should I have invited C.Must I have invited D.Should I invite
答
B.Should I have invited
should have done(本该做却没做,过去)