__________ from the moon, the earth looks like a colorful ball.    [ ]

A. Seeing                          

B. Seen    

C. Having seen                

D. Having been seen

“烟雨楼台革命萌生此间曾著星星火，风云世界逢春誓起到处皆闻殷殷雷。”——董必武题嘉兴南湖烟雨楼，对联中反映的历史事件与哪次会议有关

A．中共一大

B．国民党一大

C．中共三大

D．八七会议