With so much noise outside, I couldn’t my work and wondered what was happening.
| A．leave out | B．concentrate on |
| C．look after | D．watch over |
The door . Better have it repaired .
| A．isn’t shut | B．hasn’t been shut |
| C．won’t be shut | D．won’t shut |
I’d rather you did some housework when you are free ,but you .
| A．didn’t | B．shouldn’t | C．weren’t | D．don’t |
—We need a person badly to think up such an idea .
—the new comer have a try ?
| A．Shall | B．May | C．Should | D．Need |
—Where ____ Margaret have put the empty bottles?
—She ______ them away. They must be somewhere.
| A．can; can’t have thrown | B．must; needn’t |
| C．must; must have thrown | D．can; must throw |
—Why aren’t they here yet?
—They the bus.
| A．can have missed | B．must be late for |
| C．may have missed | D．might be late for |