【名词&注释】
白居易(bai ju-yi)、长恨歌(song of everlasting sorrow)、《梧桐雨》(rain on the plane tree)、《墙头马上》(on the wall and horseback)
[填空题]白朴为白居易后人,其杂剧《梧桐雨》取材于白居易的诗《()》,《墙头马上》(on the wall and horseback)取材于白居易的诗《()》。