Honey, you ________ alcohol for they have stopped drinking.
| A．may not have bought | B．mustn't have bought |
| C．can't have bought | D．needn't have bought |
It is the first time he ________ here and now it is high time that he ________ around．
| A．come；should be showed | B．has come；was showed |
| C．has come；be showed | D．came；was showed |
—I am really struck by your spoken English. You speak so fluently. Have you been abroad.
—Yes, I ________ in London for two years．
| A．have stayed | B．stayed | C．had stayed | D．have been staying |
Beethoven is my favorite musician. I regard him ______ other musicians.
| A．more superior to | B．more superior than | C．superior to | D．superior than |
Teachers have to constantly update their knowledge in order to maintain their professional ____.
| A．consequence | B．independence | C．competence | D．intelligence |
You must have read about Mark Twain long ago, ____?
| A．mustn't you | B．haven't you | C．didn't you | D．needn't you |