Proper exercise is good for your health._____, too much is bad for it.
A few __________ looked at him curiously when he suddenly stopped and burst out crying.
With so many children playing outside and making so much noise, he seemed unable to __________ on his homework.
Great attention must be paid __________ welfare, especially in the poor area.
—When did you last hear __________ Jay?—He phoned me this morning, and we agreed __________ a time and place to meet.
The reason why he was late for school this morning is __________ his bike broke down on his way to school.