At first       it looked like a simple accident, but later the police became doubtful.  

       A. sight             B. view              C. look              D. glimpse

 At first       it looked like a simple accident, but later the police became doubtful.   

       A. sight             B. view              C. look              D. glimpse

At first       it looked like a simple accident, but later the police became doubtful.

A. sight            B. view           C. look           D. glimpse

At first           it looked like a simple accident, but later the police became doubtful.

A．sight                   B．view                   C．look                    D．glimpse