—How about 　　　　 shopping with us tomorrow?

—I’d love to, 　　　　 I have to prepare for the coming exam.

A．go; and

B．go; but

C．going; but

D．going; and

《煤巷锚杆支护技术规范》中规定锚杆锚固力抽检要求帮锚杆的锚固力达（）kN为合格。

A、60

B、70

C、80