I'll go to visit my aunt in England ________ the summer holidays start.
| A．while | B．since | C．until | D．as soon as |
Spring is the best _______ of the year, because we can see lots of beautiful flowers.
| A．date | B．day | C．season | D．vacation |
I ________ the room yesterday, so it is not dirty today.
| A．clean | B．cleaned |
| C．will clean | D．is cleaning |
When the sun shines, the clouds _________ , and we can see everything much better.
| A．clear | B．clean | C．appear | D．leave |
The Three Gorges Dam can produce _________ for millions of people every year.
| A．electricity | B．water | C．love | D．light. |
— Shuofang Airport, please. I have to be there by 7:00.
— _________, but I'll do my best.
| A．I can't promise anything | B．Don’t worry |
| C．We still have enough time left | D．Sorry, I can’t |