下列肥料中最适宜叶面追肥的是（）。
A.牛粪
B.磷酸二氢钾
C.过磷酸钙
参考答案：B
——What do you think I should do?
——I think you’d better pay a visit to him____.
A．out of work
B．out of sight
C．out of respect
D．out of shape
