1.A ship in harbor is safe, but that’s not________ships are built for.

2.—I wonder________Mary has kept her figure after all these years.

—By working out every day.

3.If you swim in a river or lake be sure to investigate________is below the water surface.Often there are rocks or branches hidden in the water.

4.Reading her biography, I was lost in admiration for________Doris Lessing had achieved in literature.

5.You have to know________you’re going if you are to plan the best way of getting there.