—Recent pressure at work may ______ his behavior.
People are deeply struck by Forrest Gump because of his unselfish ______ to helping others.
All the students______ laughter when David walked into the classroom like Donald Duck.
Practice makes perfect. ______Mr Black passed the driving test easily.
— There is still a copy of the book in the library. Will you go and borrow ______?— No, I’d rather buy ______ in the bookstore.
It is reported that the scientists in our county are______all possible ways to control H1N1 flu.