---He ought to have been warned of the danger.

    ---_______, but he wouldn’t listen to me.

  A. He did             B. He should        C. He ought to   D. He was

It was _____ computer games that cost the boy a lot of time that he ought to have spent on his lessons.

A. to have played     B. playing            C. played            D. having played

It was _____ computer games that cost the boy a lot of time that he ought to have spent on his lessons.

　　A. to have played      B. playing

　　C. played              D. having played

28．— Is Mike going there by bus?    

— He ought to, but he ________ not. He likes riding his bike.

——He ought to have been warned of the danger.

     ——____, but he wouldn’t listen to me.

A、yes, he ought to         B、So he was  C、So was he  D、So it was with him