A college student had stayed up all night, _______ for his test the next day.
| A．studied | B．having studied | C．to study | D．studying |
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 |
Tom, behave yourself! If you keep on doing that, you'll ____ in serious trouble.
| A．shut up | B．end up | C．take up | D．pick up |
I would like to buy some good English reference books, but _______ was available from the bookstore, where I only found some Chinese ones.
| A．nothing | B．no one | C．none | D．neither |