— Could you tell me ____ for the meeting yesterday?

— Because the traffic was bad. [ ]

A. why did you come late

B. why you came late

C. why do you come late

D. why you come late

同一矿井内不沿导向层的贯通测量，因（）均无导向层可循，因此，必须同时进行平面和高程测量，以提供标定巷道中、腰线的数据。

A.上

B.下

C.中

D.左

E.右