There was a __________look on her face because a________ problem _________the little girl.
__________ 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.