—When did you________?

--I _________ the airport at 8 a.m. this morning.

A．arrive, arrived at

B．get to, got to

C．reach, reached

D．arrive, got

铜锌原电池（如图）工作时，下列叙述正确的是（　　）

A．正极反应为：Zn-2e^-═Zn²⁺

B．电池反应为：Zn+Cu²⁺═Zn²⁺+Cu

C．在外电路中，电子从正极流向负极

D．盐桥中的K⁺移向ZnSO₄溶液