16．听第五段材料，回答第18至20小题．
18．Why was Tom late for school？
A．He hit an old man． B．He helped an old man． C．He was ill in hospital．
19．What did the old man's family do in the hospital？
A．They thanked for Tom and his father．
B．They hit Tom and his father．
C．They said Tom hit the old man．
20．What do you think of Tom and his father？
A．They are good． B．They are bad． C．They often hit people．
