—You are leaving your school．How do you like it?

—Very much, of course, I      this school since I moved here

A．came to

B．have gone to

C．have been to

D．have been at

如图，重为G的物体在倾角为Ө的粗糙斜面上，受力F作用处于平衡状态，则斜面对物体的作用力为：（    ）

A．

B．

C．FsinӨ+GcosӨ

D．GcosӨ