Jack not to do that, he wouldn’t have made such a serious mistake.
| A．If I persuade | B．If I should persuade |
| C．Had I persuaded | D．If I persuaded |
A new policy formulated, _____.
| A．thus did the economic reform begin |
| B．thus began the economic reform |
| C．thus had the new economic reform began |
| D．began the economic reform thus |
_____ this something, still unseen, they gave the name radium.
| A．With | B．By | C．At | D．To |
Look out! The ceiling _____ l down.
| A．is to fall | B．will fall | C．is going to fall | D．is falling |
. Intelligence is to some extent _____ one is born with
| A．that | B．of which | C．something | D．which |
The parking meters are installed in streets to record and show the time _____ a driver
has paid for is finished
| A．when | B．if | C．after | D．that |