I failed again in the examination and only then _____ how much time I had wasted.
| A．I realized | B．I had realized | C．did I realize | D．had I realized |
----Drinking is harmful_______our health.
| A．to | B．be | C．with | D．at |
----Must I finish the jod at seven o’clock?
----No, you___________
| A．mustn’t | B．can’t | C．needn’t | D．don’t have |
---- The reason why he has been such a success is ________he had lost his money.
| A． \ | B．because | C．that | D．what |
—Should I follow in my father’s footsteps and study medicine?
— __________________.
| A．It doesn’t matter. | B．Don’t mention it. | C．That’s all right. | D．It’s up to you. |
—Do you remember _______ vase I gave you as a birthday gift last year?
—Yes, I fell in love with it at _______ first sight.
| A．a; the | B．a; / | C．the; the | D．the;/ |