Perhaps he is not quite fit for the job, but      , please let him have a try.

A．in fact

B．anyway

C．so

D．otherwise

维修倾斜井巷时（）。

A、严禁上下段同时作业

B、上下段同时作业必须制定措施

C、要带保险绳

D、上口设防止物料滚落的设施