单项选择题

Why walking is one of the easiest way to exercise

A．Because it is recommended by doctors.
B．Because there are a lot of walking programs for you to choose.
C．Because you only need to walk 30 minutes daily.
D．Because it does not need particular place or tim

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单项选择题

Which of the following is NOT true according to the author

A．A pair of comfortable shoes is needed if you want to start walking program.
B．Walking is very useful for our health.
C．The more you walk, the better.
D．Walking can make you feel relaxed from pressur

单项选择题

If you walk fast for 30 minutes every day, how many calories will be used for one week

A．100.
B．700.
C．1,400.
D．200.