．----The research on the news bird flu virus vaccine is challenging and demanding．Who do you think can do the job?
----____ my students have a go ?
| A．Will | B．May | C．Shall | D．Must |
________ is known to us a11 is that the Diaoyu islands have been part of our Chinese territory since ancient times.
| A．As | B．Which | C．It | D．What |
Why hasn’t he come?________ on time, we would have to put off the trip.
| A．If he doesn’t come | B．If he will not come | C．If he didn’t come | D．If he wouldn’t come |
Kate _________ in America for many years, but she’d never regretted her decision to return to her motherland.
| A．worked | B．was working | C．has worked | D．had worked |
The old man, ________ abroad for twenty years, is on the way back to his motherland.
| A．to work | B．working | C．to have worked | D．having worked |
—Life is full of opportunities for you.
—That’s right. _____ .
| A．It’s my cup of tea. | B．I have butterflies in my stomach. |
| C．It will cost an arm and a leg. | D．The world is my oyster. |