Mark was a student at this university from 1999 to 2003, _______he studied very hard and was made Chairman of the Students’ Union.
The pen well, so it ___ well.
Hurry up ___ we ___ miss the train.
We were having evening class ____ the light went out.
When I jumped into the river, the water ___very cold.
Since the project has been ___ on well, you must ___ it on until it is completed.