Nobody knows how the accident _________．The police are investigating it．
| A．came out | B．came about |
| C．came in | D．came down |
Last night Bruce was observed________the building with two young men and take a taxi away.
| A．leave | B．left |
| C．having left | D．to leave |
For more information about the job employment ad.，please________our website on the Internet at www.state.gov or telephone 619－5886.
| A．pass away | B．call up |
| C．refer to | D．put up |
We should keep in mind that the earth is our only home and only by saving the environment________ourselves.
| A．we can save | B．can we save |
| C．we must save | D．must we save |
Many a student________selected to take part in the English competition，and more than one teacher________them on speaking and writing.
| A．was；has coached | B．were；have coached |
| C．was；have coached | D．were；has coached |
—I’m worrying about the coming examination.I’m afraid I cannot pass it.
—________！I’m sure you’ll make it.
| A．Go ahead | B．Good luck |
| C．No problem | D．Don’t lose heart |