煤厂用一辆载重为10吨的汽车去拉一堆重72吨的煤，需要拉几趟？正确的算式为[ ]

A．72 - 10 =7.2（趟）    

B．72÷10≈7（趟）    

C．72÷10≈8（趟）

— OK, I’ve had enough of it. I give up.

— You can’t _______your responsibilities.

A．run off with

B．run up against

C．run out of

D．run away from