Studies show that people are more______to suffer from back problems if they always sit before computer screens for long hours．

1. A.
   likely
2. B.
   possible
3. C.
   probable
4. D.
   sure

 Studies show that people are more_________to suffer from back problems if they always sit before computer screens for long hours.                                      

A. likely          B. possible          C. probable          D. sure   

Studies show that people are more _____ to suffer from back problems if they always sit before computer screens for long hours.

Studies show that people are more _____ to suffer from back problems if they always sit before computer screens for long hours.

A．likely             B．possible           C．probable          D．sure

Studies show that people are more        to suffer from back problems if they always sit before computer screens for long hours.

Studies show that people are more        to suffer from back problems if they always sit before computer screens for long hours．

    A．likely               B．possible         C．probable         D．sure

Studies show that people are more_________to suffer from back problems if they always sit before computer screens for long hours.                                      

 Studies show that people are more_________to suffer from back problems if they always sit before computer screens for long hours.                                      

A. likely          B. possible          C. probable          D. sure   

Studies show that people are more _______ to suffer from back problems if they always sit before computer screens for a long time.  

A. likely       B. possible         C. sure     D. probable

Studies show that people are more ______ to suffer from back problems if they always sit before computer screens for long hours.