The old lady was so pleased with all ______ we had done for her ______ she wrote us a thank-you letter.
| A．what; that | B．that; that | C．which; that | D．that; what |
Dry weather______the peasants’harvest this year.
| A．has influenced | B．has affected | C．have effected | D．have efforted |
This is a______ but extremely difficult technology in the future.
| A．satisfactory | B．costly | C．promising | D．far-fetched |
They only hear while their hands and eyes are_________ occupied.
A other than B. no other than C. otherwise D. other ways
No sound and no voice______ for a while.
| A．have heard | B．has heard | C．has been heard | D．have been heard |
In America, ______ car is ______ popular means of transportation.
| A．the; a | B．a; the | C．the; the | D．the; / |