The computer isn’t working properly: ______________ (肯定有什么地方出了毛病).

A．constant
B．regular
C．lasting
D．normal

A．the gorilla is the biggest
B．the gibbon is only three feet high but it is heavier than the orangutan
C．the orangutan is smaller than the gorilla and cleverer than the gibbon
D．the orangutan can stand up to a great height, but others cannot