— Flight MU257 ______, I must be off now.
— Have a nice trip.
| A．is being announced | B．has announced |
| C．was announcing | D．had been announced. |
Many strange new means of transport have been developed in our century, the strangest of _______ being perhaps the hovercraft(气垫船).
| A．which | B．them | C．that | D．it |
The company used 50 percent of the raw materials, the rest of which __________ sent to other cities to help the factories there.
| A．is | B．was | C．are | D．were |
--- Do you really think I can achieve my goal ?
--- Absolutely .___ you give up halfway .
| A．If | B．Unless | C．Since | D．because |
In our childhood, we were often_____ by Grandma to pay attention to our table manners.
| A．demanded | B．reminded | C．allowed | D．hoped |
___ in the fascinating book , he did not notice a thief enter his room.
| A．To absorb | B．Absorbing | C．Absorbed | D．To be absorbed |