Mr. Li           Kunming. He                the city three times. This time he        Kunming for three days.

A. has been to ,have gone to ,have been in

B. has gone to ,has been to , has been in

C. have been in, has been to ,have gone to

D have gone to, have been in , has been to

施工现场的火灾危险性不包括（）。

A.易燃、可燃材料多

B.临建设施多，防火标准低

C.临时电气线路多

D.施工单位员工多，人员固定，素质低