It's very dangerous __________ football in the street.

A. play                 B. Playing   C. played               D. to play

The policeman told the little boy ___ football in the street. It’s dangerous. 

The head teacher told the boys ________football in the street．It’s dangerous．

A．not play                  B．play                 C．not to play                     D．to play

It's dangerous.(　)

A. not play　　　　　　　　　　    B. not playing

C. not to play　　　　　　　　　　    D. to play