All his time _______research on Chinese history, he has no time for outdoor activities.
| A．devoted to do | B．devoted to doing |
C．devoting to doing | D．is devoted to doing |
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 |
---Those shoes won't_____for mountain-climbing.
---_____this pair be OK?
| A．help;Shall | B．work; May | C．do;Will | D．get;Would |
Now Robert, a football fan in our class, ____ rome of his daily allowance given by his parents in order to buy a new football.
| A．is giving away | B．is throwing away |
| C．is putting away | D．is taking away |