--- Remember, Dad, Thomas Edison got bad grades in school, too.
--- Stay in your room until you’ve _____ the electric lamp.
A invented B discovered C made D imagined
Although the new road is being used, it has not yet been opened.
| A．fluently | B．gradually | C．frequently | D．officially |
If you joke with him he’ll think you are insulting(侮辱) him .
| A．on purpose | B．by accident | C．by coincidence | D．at present |
In order to know how heavy the elephant was, he wrote down the weight of each stone and then ____all the weights.
| A．packed up | B．added up | C．went through | D．set down |
Bob could have seen the famous pop star ______ yesterday morning.
| A．did he come | B．if he came | C．had he come | D．if he should come |
–– It is ridiculous that John wants to make academic progress but never devotes any time to it.
––– Maybe it’s time for him to know______.
| A．heaven never helps the man who will not act |
| B．he who makes constant complaint gets little compassion. |
| C．hope for the best, but prepare for the worst |
| D．It is easy to be wise after the event. |