In the experiments, the scientists found that water __________ at 100℃.
| A．boils | B．boil |
| C．has boiled | D．had boiled |
Would you like towith us to the film tonight?
| A．come along | B．come off | C．come across | D．come through |
--I'm sorry I made a mistake!
--Nobody is perfect.
| A．Take your time | B．You're right | C．Whatever you say | D．Take it easy |
The airport ___next year will help promote tourism in this area.
| A．being completed | B．to be completed |
| C．completed | D．having been completed |
Nowadays people are more concerned about the environment ___ they live.
| A．what | B．which | C．when | D．where |
____ which university to attend, the girl asked her teacher for advice.
| A．Not knowing | B．Knowing not | C．Not known | D．Known not |