— Had we been more careful, the accident might not have happened.
— But we _____ at that time.
| A．hadn’t | B．didn’t | C．weren’t | D．might not |
________ he works hard, I don't mind when he finishes the experiment.
| A．As soon as | B．As well as |
| C．So far as | D．So long as |
his play,, is very wonderful: there are many interesting characters in it.
| A．out of the question | B．on the whole |
| C．in doubt | D．under no condition |
Quantities of water ________for cooling in the only one of the factories that ________steel.
| A．has been needed；produces | B．have been needed；produce |
| C．is needed；produce | D．are needed；produces |
They were surrounded by the enemy, but they ________at last from the village.
| A．managed escaping | B．tried to escape |
| C．managed to escape | D．tried escaping |
—How do you find Qingdao, Mary?
—It’s a beautiful seaside city. I have ________it for my next holiday.
| A．decided on | B．tried on | C．taken on | D．carried on |