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What is exercise?
观察发现小语法知识点：
动词ing（现在分词）形式放在句子开头做主语，后面的be动词要用单数形式is.
Exercise helps make your body healthy and strong.
How many hours of exercise does Danny need a day?
About an hour of exercise a day.
Danny walks to school in the morning.
2. Danny flies home after school.
3. Danny has fifteen minutes of exercise a day.
4. Danny is going to play more sports.
5. Danny needs to get more exercise.
( )
( )
( )
Yes
No
No
Yes
ten
watch
walks
No
( )
( )
1.( ) __a bike is exercise.
A. Ride B. To ride C. Riding
2.( ) I walk __school in the morning,and I walk __home after school.
A. to, to B. to. / C. /, to
3.( ) Sixty minutes make __hour.
A. a B.an C.some