Tom is very friendly and helpful. He always ________ his teachers and classmates.  [ ]

A. gets on to    

B. gets along to        

C. gets on good with    

D. gets along well with

我国四大地理区域中，平均海拔最高的区域是[ ]

A．南方地区

B．北方地区

C．西北地区

D．青藏地区