Sandy likes playing _______ badminton after _______ dinner.

You see, “Food Safety” receives thousands of Internet hits a day.—Obviously, it has become one of the________ topics recently.

It’s eleven p.m.. Mary is still working _____ the light. [ ]

Look! Some boys are playing baseball, ________ are chasing, they all have fun.

She often helps the old ____ their housework.[ ]