单项选择题

A．Because they bent over from the waist.
B．Because they bent their knees and squat down.
C．Because they keep their back and hips in a straight line.
D．Because they used the muscles in the lower back.
<上一题 目录 下一题>
热门 试题

单项选择题
A．A guide.B．A waiter.C．A porter.D．A cook.
A．A guide.
B．A waiter.
C．A porter.
D．A cook.
单项选择题
A．It is very good.B．It should be higher.C．It varies according to the person’s experience.D．It’s the same as the post office pays.
A．It is very good.
B．It should be higher.
C．It varies according to the person’s experience.
D．It’s the same as the post office pays.
相关试题