First impressions are the most lasting. After all, you never get __________ second chance to make __________ first impression.
| A．a; the |
| B．the; the |
| C．a; a |
| D．the; a |
You _____ the flowers more water so that they can grow well now.
| A．would have given | B．might have given |
| C．must have given | D．should have given |
You _____ across the road without looking round; you _____ down by a car.
| A．shouldn’t run, might have been knocked |
| B．shouldn’t have run, might have been knocked |
| C．mustn’t run, could have been knocked |
| D．mustn’t have run, could be knocked |
–Did Ken take the job in the bookstore?
–No, but I think he _____.
| A．will have | B．may have | C．should have | D．must have |
He _____ more than thirty.
| A．mustn’t be | B．shouldn’t be | C．won’t be | D．can’t be |
A computer _____ think for itself; it must be told what to do.
| A．can’t | B．wouldn’t | C．mustn’t | D．may not |