With sufficient scientific information a manned trip to Mars should be _____.
| A．obtainable | B．potential | C．considerable | D．feasible |
I don’t know the reason _____ you were absent from the meeting, and I am not sure that someone will tell me the reason _____ you haven’t told me.
| A．why; that | B．that; why |
| C．because; why | D．of which; that |
Although the working mother is very busy, she still _____ a lot of time to her children.
| A．devotes | B．spends |
| C．offers | D．provides |
The book has helped me greatly in my daily communication, especially at work _____ a good impression is a must.
| A．which | B．when | C．as | D．where |
When you’ve finished with that book, don’t forget to put it back to the shelf, _____?
| A．do you | B．don’t you |
| C．will you | D．won’t you |
My parents always encourage me that no matter what is going to happen, I’ll ______ the hard time and live better.
A. end with B. get through
C go through D. wait for