The children ______ a P.E. class on the playground when it began to rain suddenly.

China supplies more than 90 percent of the world’s rare earth metals, but its reserves only ________ about one-third of the world’s total.

Is there anything special in the newspaper today?— Yes. People who drink wine ___ to drive after May Day.

_______ of the watches would you like?—I’ll take ________ of them, so I can give one to my sister.

Could you please show ____ your ticket?– Here you are.