关于如图所示装置的叙述，正确的是（　　）

A．铜是阳极，铜片上有气泡产生

B．铜离子在铜片表面被还原

C．电流从锌片经导线流向铜片

D．正极附近的SO₄^2-离子浓度逐渐增大

Kate's never late for school, ______?[ ]

A. isn't she

B. hasn' the

C. is she

D. has she