Fred entered without knocking and, very out of breath, sank _______ a chair.
| A．on | B．off | C．into | D．to |
Because of the powerful earthquake, telephone lines, electricity and water supplies were
____ in that area for several days．
| A．cut down | B．cut in | C．cut up | D．cut off |
China Daily is _____ a newspaper; it keeps us in touch with the world．
| A．no more than | B．not more than | C．more than | D．less than |
It is every citizen's duty to _____ our country when she is attacked by the enemy．
| A．approach | B．defend | C．support | D．preserve |
—How long have you been here?
—___ the end of last year．
| A．Since | B．At | C．By | D．In |
It rained for several weeks, completely ____ our holiday．
| A．ruined | B．ruining | C．to ruin | D．ruin |