——Ms Lin looks rather a kind lady.
——But in fact she is cold and hard on us. You ____ believe it!
| A．shouldn’t | B．wouldn’t | C．mustn’t | D．needn’t |
______ it ______ for your help, I couldn’t have made any progress.
| A．Had; not been | B．Should; not been |
| C．Did; not been | D．Not; been |
—Did you go swimming last Sunday?
—No. We would have gone ______ nicer.
| A．if the weather was |
| B．would the weather have been |
| C．had the weather been |
| D．should the weather be |
—Do you think the thief entered through the window?
—No, if he had, I don’t believe, _______ broken the living-room’s window.
| A．he would have | B．he must have |
| C．he had | D．should he have |
If he ______ it, he _______ it.
| A．had seen; could have believed | B．saw; couldn’t believe |
| C．saw; couldn’t have believed | D．has seen; had believed |
If he had worked harder, he _________.
| A．would succeed | B．had succeeded |
| C．should succeed | D．would have succeeded |