. Finding his iPad stolen on the bus, ________.
| A．the bus driver was asked to help | B．the bus was searched |
| C．it was looked for everywhere | D．David called for help |
——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．Shall | B．Must | C．Will | D．May |
——What should I wear to attend his wedding party?
——Dress ____ you like.
| A．what | B．however | C．whatever | D．how |
He is only too ready to help others, seldom, ____, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |
——How much vinegar did you put in the soup?
——I’m sorry to say, ____. I forget.
| A．no | B．no one | C．nothing | D．none |
We hope to go to the beach tomorrow, but we won’t go ____ it’s raining.
| A．if | B．when | C．though | D．because |