_____ to sunlight for too much time, as the doctors say, will do harm to one’s skin.

A．Being exposed

B．Having exposed

C．Exposed

D．After being exposed

古希腊能创造如此灿烂的文明，原因有　①奴隶的劳动　②民主政治的实行　③思想的解放　④优越的地理位置　⑤东方文明的影响

A．①②③

B．①②③⑤

C．①②④

D．①②③④⑤