Shortly after the accident, _____ policemen were sent to the spot to keep order.
| A．score of | B．two scores | C．score | D．scores of |
Don’t leave the waterwhile you brush your teeth.
| A．run | B．running | C．being run | D．to run |
—May I tell this to my close friend?
—No, you. Never let anybody else know about it.
| A．needn’t | B．shouldn’t | C．mustn’t | D．can’t |
The world is changing fast. I strongly believe that one will easily fall behind he keeps on learning.
| A．unless | B．if | C．when | D．as |
His speech at the meeting was really wonderful, and it could never be any.
| A．best | B．better | C．worse | D．worst |
All theindicate that he has been deeply involved in the crime.
| A．evidence | B．fact | C．factors | D．cause |