John is the tallest boy in the class,       according to himself.

A．five foot eight as tall as

B．as tall as five foot eight

C．as five foot eight tall as

D．as tall five foot eight as

在诊断与排除汽车制动故障的操作准备前应准备一辆（）汽车。

A、待排除的有传动系故障的

B、待排除的有制动系故障的

C、待排除的有转向系故障的

D、待排除的有行驶系故障的