When I was a child, my father ______ read me a story at night before bedtime．

— What are you going to do this weekend?— I don’t know. I ______ visit a friend.

He           have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.

The room is in a terrible mess; it        have been cleaned.

— I missed the earliest flight in the morning. It was really a pity. —You _________ to the airport by taxi instead of by bus.