Where _________ they live?[ ]
A. am
B. is
C. do
答案：C
承力索、接触线间的距离小于等于1000mm时采用（）型横向连接的方式。
A、“C”
B、“S”
C、A、B均可
Lu Xun is known _____not only a great writer but also a great thinker.
A． to
B．for
C．with
D．as
