It was playing computer games that cost the boy plenty of time that he ______doing his lessons.
A. might have spent           B. must have spent  
C. ought to have spent         D. must gain]

It was playing computer games that cost the boy plenty of time that he ______doing his lessons.
A. might have spent           B. must have spent  
C. ought to have spent         D. must gain

It was playing computer games that cost the boy plenty of time that he ______ spent doing his lessons.

    A. might have                   B. should

    C. ought to have                    D. could

It was playing computer games that cost the boy plenty of time that he __________have spent doing his lessons.

A. might　　　　　 B. must　　　　 C. ought to　　　　 D. could

It was playing computer games that cost the boy plenty of time that he _______ have spent doing his lessons.?
A.might  B.must C.ought to D.could