Don’t play a trick ________ him. [ ]

You’d better not always look up the new words __________ the dictionary while reading. Sometimes we need to guess. [ ]

Is Mr. Smith in the office?- No, He＿＿＿＿＿＿to the library.

There are _______ doctors and nurses working hard in that hospital.

I don’t know the new word. — It doesn’t matter, you can ______ in the dictionary.