The Australian boy has a good ________ of Chinese and can express himself freely in it.
| A．power | B．command |
| C．demand | D．usage |
—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 |
Everyone doesn't agree to the plan. Some support it while I'm one of ___ opposed to it.
| A．those who | B．who | C．those | D．that |