插在底座上的立杆采用3.Om和1，8m两种不同长度立杆交错布设，往上采用（）的立杆。
A、3.Om
B、1.8m
C、两种都可以
D、其他
参考答案：C
Traditional Chinese sports are similar to the Western sports _______ both are meant to improve people’s health.
A．that
B．in which
C．in that
D．不填
We hope that with the help of the new skill, Liu Xiang can run _____ than before. [ ]
A. fast
B. faster
C. fastest
D. the fastest
