You’d better put a cloth over the salad to ______ the flies for the sake of health.

He________after a few days’ treatment in hospital.

 To his joy, the suggestion he put forward at the meeting was _______ immediately.

The gas tank____________ twenty gallons of gas, but now it may____________ only three gallons.

 ---- Did he give you advice on your work yesterday?---- Yes. But his advice, as a matter of fact, ______ my difficulty.