A policeman saw two thieves ____ a girl’s mobile phone on a bus and he caught them at once.

A policeman saw two thieves ____ a girl’s mobile phone on a bus and he caught them at once.

1. A.
   to steal
2. B.
   stealing
3. C.
   stole
4. D.
   stolen

A policeman saw two thieves ____ a girl’s mobile phone on a bus and he caught them at once.

A. to steal              B. stealing             C. stole                   D. stolen

A policeman saw two thieves ____ a girl’s mobile phone on a bus and he caught them at once.