We would have called a taxi yesterday if Harold ________ us a ride home.

She didn't answer the phone.She ___ be asleep.

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

.—Would you mind if I opened the window? — ____. In fact , I was going to suggest you _____it.

David did not regret saying what he did but felt that he     it differently.