It took me a long time before I was able to fully appreciate what they _____ for me.
| A．had done | B．did |
C．would do | D．were doing |
Jane told me she would not attend the conference ______.
| A．if she invited | B．when inviting |
| C．unless invited | D．while inviting |
Without facts,we cannot form a worthwhile opinion,for we need to have factual knowledge ______ our thinking.
| A．upon which to base | B．which to be based on |
| C．which to base on | D．to which to be based on |
They said that they ______ a wonderful time in Beijing and they hoped to be there again.
| A．had | B．would have |
| C．would have had | D．could have |
______ so much electrical equipment,wood and paper in one place,there is a danger of fire.
| A．For | B．In | C．With | D．By |
______ your help,I got the first in the final-term English examination.
| A．Thanks to | B．Without |
| C．If not | D．But for |