18．Why do they walk very quickly？ A．Because it is very cold outside． B．Because it's a good way to keep healthy． C．Because there are dogs walking after them．
16．Listen to the passage and tell whether the following statements are true or false （判断下列句子是否符合你听到的内容，符合的用"T"表示，不符合的用"F"表示） 15．A rich man hired （雇佣） a little girl to count his money to know how much money he had． 16．The little girl spent six days counting the rich man's twenty-four million dollars， 17．The little girl was so foolish that she asked only two pennies for her first-day work． 18．The rich man felt happy because he thought he would pay only a very few dollars． 19．The rich man signed a contract （～'M） with the girl in order not to let her change her mind． 20．At the end of the story，the little girl got the twelve pennies in all for her six-day work．
