—Excuse me, ________ is the library from here?—It’s about 5 minutes’ walk.
Sally has been swimming ______ four hours.
Sam ______ coins since he was eleven years old, and now he has hundreds of them.
I had a really hard time _____studying science this term.
Don’t ______ others when they make mistakes.
---It’s Tom’s birthday next Sunday. What should I get for him? ----______________