The pressure of this gas pipe is greater than__________.
| A．the gas pipe |
| B．of the gas pipe |
| C．that of the gas pipe |
| D．those of the gas pipe |
—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 |
Supposing the weather ________ bad, where would you go ?
| A．is | B．will be | C．were | D．be |
If I _______ it, I would do it in a different way.
| A．were to do | B．do | C．had done | D．was to do |