____in the sports world, a sportsman needs to train constantly to keep himself in best condition.
| A．Survive | B．Surviving | C．To survive | D．Survived |
Mother told Jim to watch the milk until it boiled and then _____ off the gas.
| A．turn | B．turning | C．turned | D．having turned |
Your mother, however, ____ say that to us that day.
| A．does | B．did | C．is doing | D．was doing |
_____ with a good education can apply for the job.
| A．Who | B．Whoever | C．Anyone | D．Who ever |
He just does what he pleases and never _____ about anyone else.
| A．think | B．thinks | C．thinking | D．thought |
They kept trying _____ they must have known it was hopeless.
| A．if | B．because | C．when | D．where |