.When I came in, I saw Dr. Li _______ a patient.
| A．examine | B．examining | C．to examine | D．examined |
--The research on the new bird flu virus vaccine is challenging and demanding. Who do you think can do the job?
--________ my students have a try?
| A．Should | B．Shall | C．Will | D．May |
--How much salt did you put in the soup?
--I’m sorry to say, ________. I forget.
| A．no | B．no one | C．nothing | D．none |
________ the important documents were needed_______.
| A．Where; finding | B．What; found |
| C．When; to find | D．When; to be found |
We are waiting until the weather ________ a little.
| A．takes up | B．picks up | C．turns up | D．makes up |
--He must have received a good education in his childhood, ________ he?
--________, he is polite and well-behaved and acts like a gentleman.
| A．didn’t; Yes | B．has; Yes | C．has; No | D．didn’t; No |