In face of the challenge for the moment, it’s most important to ______ a good state of health.
| A．keep up | B．keep away | C．keep off | D．keep out |
All but Tom ___that film before.
| A．has been | B．have seen | C．must see | D．had seen |
“____either you or he to go there?” “_____is.”
| A．Are; Both | B．Are; Neither | C．Is; Neither | D．Is; Each |
____of the land in that district ____covered with trees and grass.
| A．two fifth; is | B．two fifths; are |
| C．two fifths; is | D．two fifths; are |
Burning all the lights in the classroom will be a great______ on electric power.
| A．waste | B．lack | C．drain | D．damage |
If you build a house with good_______ , it will last long.
| A．foundation | B．floor | C．basis | D．ground |