He must stop_________ jeans, because they are out ofstyle.

The traffic department has taken effective measures ________ the car speed in the town and ________ the traffic accidents.[ ]

Scientists are convinced the positive effect of laughter physical and mental health[ ]

下列各句中，没有语病的一句是（ ）

—Do you think we should accept that offer?—Yes, we should, for we ___such bad luck up till now, and time __ out. [ ]