问题
periment shows that proper amounts ofexercise, if regularly, can improveour health.
A:At that moment, a boy entered the classroom
B:He’s living in Australia now and he loves it
C:It doesn’t matter because all the dark days have gone
D:to carry out
B:He’s living in Australia now and he loves it
C:It doesn’t matter because all the dark days have gone
D:to carry out
正确答案是：
