-----He should have come to join in the thorough cleaning. -----He________, I think. It’s not his turn.
__________ many times, he finally understood it.
Every evening after dinner, if not ___________ from work, I will spend some time walking my dog.
---- My leg hurts a lot----You'd better go to the doctor and have it ____.
Mary went to the box office at lunch time, but all the tickets __________ out.
News came from the office __________ Wang Lin had been admitted to Beijing University.