Children are encouraged to _________some pocket money for Christmas gifts.
The experiment __ to be .
Many _______ of years later, the first extremely small plants began to appear on the surface of the water.
As a child, Franc _____.
They won’t buy any new clothes because they ________ money to buy a new car.
Jenny worked hard before the final examination, and it _______ .She got an A.A.showed off B.paid off C.put off D.took off