Not until ________to do my homework ________ how much time I had wasted playing computer games.
| A．I began; I realized | B．I began; did I realize |
| C．did I begin; I realized | D．did I begin; did I realize |
______ is surprising to us is that Tom, for ______ English was once boring, can speak English fluently as though he were a native speaker.
| A．What; whom | B．What; whose | C．It; whose | D．As; whom |
Bad habits are no way easy to be ______; it needs your determination and perseverance.
| A．replaced | B．moved | C．removed | D．got rid |
What a pity! Considering his ability and experience, he ______ better.
| A．need have done | B．must have done |
| C．can have done | D．might have done |
They advocate the proposal we were opposed ______ rediscussed at the next meeting.
| A．to be | B．should be | C．to was | D．was |
The doctor advised the patient to give up smoking _____ his own health.
| A．in terms of | B．as a result of |
| C．in regard to | D．for the sake of |