单项选择题

It is Sunday. Mike and his father are going to the Walter Disney. They are going to learn skating. There are many children there. They are skating. They fly here and there like birds. Mike thinks skating must be very easy and interesting.
Mike puts on the skating shoes. He is very scared. He can’t stand still. He falls to the ground again and again. He is black and blue.
Mike’s father comes here and helps him to skate. He practices again and again. Soon he can skate slowly, but he can’t skate quickly.
On his way home, Mike thinks he must work hard if he wants to learn something. No pains, no gains.
Mike practices again and again. Soon he can skate quickly.