下列各项中不属于动物在自然界中作用的是（　　）

A．维持生态平衡

B．制造有机物

C．帮助植物传粉

D．促进生态系统中的物质循环

My cousin        in Beijing University at present, after which she will work in Beijing.

A．educated

B．has been educated

C．is being educated

D．was educated