The missing boys were last seen____ near the river.

A.     playing  B. to be playing  C. play  D. to play

The missing boys were last seen ___ near the river.

A. playing  B. to be playing  C.play   D. to play

The missing boys were last seen _______ near the river.

A. to play                                                                   B. to be playing

C. play                                                                        D. Playing

The missing boys were last seen ___ near the river.　　　　

A. playing　　　　　 B. to be playing　 C. play　　　　　　　 D. to play  

The missing boys were last seen ________ near the river.

A. playing　　　 B. to be playing

C. play　　　　 D. to play