看图填空，一空一词。（共5小题，每小题1分；计5分）
小题1: What can you see in the picture?
We can see that a school a skating Marathon.
小题2: How many people are there in the picture? And who are they?
There are seven. Five are students and the of them are .
小题3:What are the they doing?
A man and a woman are Alison, most students are skating and two of them are on the ground.
小题4: What is Alison doing?
He is the woman’s .
小题5:When did Alison started skating?
He started skating hours .
，它沿斜面下滑的距离是（ ）
