Look, the family are _____ their dinner at home. [ ]

A.enjoys to have

B.enjoying having

C.enjoying to have

D.enjoys having

人工挖孔桩安全措施包括（）。

A、照明电压采用110伏

B、护壁应高出地面150~200mm

C、设鼓风机向井下送风

D、孔径小于1m可不设安全软梯

E、孔下有人时孔口有人监护