运输生产活动按其经营性质的不同分为（）。

A．厂内运输和厂外运输

B．营业性运输和非营业性运输

C．旅客运输和货物运输

D．自用运输和公用运输

---You were tired out after the mountain climbing, weren't you?

---Yes, ______. I could hardly rise to my feet.

A．not at all

B．not a little

C．not a bit

D．not really