—How many days are there a week? — Seven.A. on B. at C. in
-- Mom, we are running out of milk. -- Let's go to the ______ to buy some.
In order to give children a better life in the future, we should ____ the environment.
Excuse me, may I ______ your dictionary? ______ is at home.
There are _____ oranges on the table.
It's too cold here. Please put _____ your coat.