walking is good exercise.为什么不加a?
walking is good exercise.为什么不加a?
Walking is good exercise,为什么walk要加ing?
Walking is good exercise.同意句
It's good exercise.为什么good前不用加a?
Walking up and down the stairs is a good kind of exercise to
Walking is a fine exercise同义句
Climbing mountain is a good exercise.为什么不直接用Climb而要用Climbing
this is good exercise 为什么不是this is a good exercise ?
i think walking is good for my health walking为什么加ing
Walking is good中Walk为什么要加ing呢还有就是It is a fine day for walkin
it is best to exercise twice a week中 best 为什么不加the
Riding a bike is exercise.为什么Riding不能用ride?