41. If it ______ for the fence, he ______ into the river.
A. were not; fallen B. had not been; could have fallen
C were not; could fall D. had not been; could fall
We hope that she will ____ soon.
| A．returns back | B．reach to home | C．reach for | D．pull through |
If we can keep ____ this speed, we'll arrive there in two or three hours.
| A．on | B．to | C．up | D．at |
The Great Wall was built to keep ____ the invaders.
| A．in | B．out | C．up | D．off |
I should very much like to have gone to the party, but______.
| A．I'm not invited | B．I won't be among the invited |
| C．they won't invite me | D．they didn't invite me |
---Those shoes won't_____for mountain-climbing.
---_____this pair be OK?
| A．help;Shall | B．work; May | C．do;Will | D．get;Would |