--- ______! Where is my jacket?

--- ______, I don’t know.

A．Excuse me, Yes

B．Excuse, Sorry

C．Excuse me, Sorry

D．Yes, Sorry

我国第三级阶梯主要地形类型是（   ）

A．高原、盆地

B．平原、盆地

C．平原、丘陵

D．盆地、丘陵