helicopter can take off and land straight up or down, and can also stay
still in air.
| A．The; an | B．A; the | C．A; 不填 | D．The; 不填 |
The doctor had almost lost hope at one point, but the patient finally__________ .
| A．pulled out | B．pulled through | C．pulled up | D．pulled over |
After ________________ a sandstorm warning on Sunday evening, meteorologists forecast that dusty weather will continue in parts of the country on Monday.
| A．breaking off | B．calling off | C．leaving off | D．putting off |
The U.S. official said North Korea --- and Iran --- should follow in the steps of Libya, which last December said it would work__________ to allow international weapons inspectors to do their work.
| A．unconditionally | B．unwillingly | C．unfortunately | D．uncomfortably |
E-mail , as well as cellphones, _____an important part in daily communication.
| A．have played | B．play | C．are playing | D．is playing |
This kind of storiesinstructive while stories of that kindharmful to children.
| A．is; seems | B．are; seem | C．is; seem | D．are; seems |