I _____ the way to his office because  I didn’t know how to get there.

A. was showing

B. showed

C. am shows

D was shown

流水节拍采用公式法计算时，用到的参数有（）进行计算或估算。

A.施工过程数

B.施工班组人数

C.施工作业时间

D.时间定额或产量定额