---Try to remember to turn off the light when you leave the room.
---I’m trying to expenses.
| A．keep off | B．keep down | C．keep out | D．keep from |
Our government has taken some measures to overcome the lack of electricity, but it may take some time________ we have enough power．
| A．since | B．after | C．unless | D．before |
Science and technology are advancing so quickly that________ is a possibility today may be a reality tomorrow．
| A．that | B．which | C．不填 | D．what |
Each person has his / her unique character which ________him / her from others．
| A．differs | B．distinguishes | C．divides | D．draws |
That is the only way we can imagine________ the overuse of water in students’ bathrooms.
| A．reducing | B．to reduce | C．reduced | D．reduce |
．—You didn’t take the high-speed train with the leading letter "G" to Shanghai?
—________. I still took the "D" train, which saved me more than 50 yuan．
| A．Yes, I didn’t | B．No, I did | C．Yes, I did | D．No, I didn’t |