—I wonder how much you charge(要价) for your services.—The first two are free the third costs¥30.
The little boy sat _____ to his father, and listened ____ with great interest
Two dresses look similar _____ each other , but they differ _____ material
______ some pennies , I think there are only nine pounds left in my pocket.
To keep healthy, Professor Johnson ______ cycling as a regular form of exercise after he retired.
One way to understand thousands of new words is to gain _____ good knowledge of basic word information.