我的腿如此劳累，以至于我想停下来。
My legs were         tired        I wanted to stop.
蔬菜对我们的健康是有好处的。
Vegetables are                       our health.
大明喜欢球类运动，如足球和篮球。
Daming likes balls,                  football and basket ball.
他一个月踢足球至少四次。
He plays soccer                     four times a month.
学生中有多少百分比的学生根本不锻炼身体？
How many percent of the students do not exercise____  ______.