three
                    - The books may for three days.
 - Three problems are too hard to . Will you give me some advice? —-There are many ways. The mostt important is to have a careful plan.
 - Four dollars a pair? I think it’s a bit too much.— If you buy three pairs, the price for each will _______ to three fifty.
 - He hasfor three or four days.
 - What’s three and two? –It’s________.
 - My watch is three minutes slow. What about ______?
 - Peter tried on three jackets, but _______ of them fitted him.
 - There are three ________ students in their school.
 - Three _________ the students visited the museum yesterday.
 - There are three ______ students on the playground.