山东交通发达，（ ）铁路横贯东西。
A．胶济
B．荷兖石
C．兰烟
D．京九
参考答案：A,B,C
The idea reading too many books ruins your eyes is wrong. [ ]
A. which
B. when
C. that
D. how
谈判的角度是多元化的。
