Mr. Li said he would show the students ____ the New York

City, which is famous ____ the world.

A．about; at

B．around; in

C．through; in

D．towards; around

当前，我国义务植树实行的是什么管理？（）

A.中央统一管理

B.属地管理

C.中央与地方管理结合

D.城市与农村管理结合