---Did you notice Tom was busy all day in his office?---Oh, yes, he has just finished his business tour of Chicago. He has a lot of work to ___.
______ in my life impressed me so deeply as my first visit to the Palace Museum.
We _______ on this project for four hours. Let’s have a rest.
What the doctor really doubt is_____my mother will revover from the serious disease soon.
Her name was on the _______of my tongue, but I couldn’t tell it.
________her home, Mary helps her mother with some housework.