问题

We have done things we ought not to have doneand ________ undone things weought to have done.

A:left
B:leave
C:will leave
D:leaving

正确答案是：

同类题型

Tom, your books should be inright order.—OK. I’ll______ right now.

I ______ my mum cook dinner in the kitchen when the telephone ________.

Do you know theofthe saying I just quoted

下列短语的搭配，不完全恰当的一项是（）

Why not join us in the game, Millie— _______, but I have to do my homework first.