22（）

单项选择题The old man was very strange because（）

A．he liked to live alone
B．people didn’t like him and were afraid of him
C．he liked to walk in the woods without roads
D．he didn’t do anything as the others did

单项选择题Which of the following is NOT a possible reason for whales dying（）

A．Pneumonia.
B．Brain infection.
C．Over-population.
D．Over-eatin