---The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?
---____ my students have a try?
| A．May | B．Must | C．Will | D．Shall |
Mum ______ to us. “Be quiet! Your little sister is sleeping.”
| A．shouted | B．explained | C．whispered | D．replied |
Einstein’s theory, which was doubted by most scientists at first___out to be correct in the end.
| A．proved | B．was proved | C．turned | D．tested |
—Thank you for offering me so much advice on English learning, Tom.
—_______ .
| A．With pleasure | B．It’s all right |
| C．It’s my pleasure | D．It’s nice to say so |
He thinks so highly of the movie Avatar that he thinks it is worth
seeing ______ second time.
| A．the | B．a | C．the other | D．other |
It was probably _______ the wrong operation(操作) of the pilot that caused the plane to crash.
| A．because of | B．because | C．as a result | D．\ |