It was 5 o’clock __________ the visitors finally arrived at Pudong International Airport.
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