三天后，Jacky将邀请他的好朋友到家里来开一个 party 。现在，Ella 正在热火朝天地为 party 做准备呢！Look, Jacky is busy working! First, he mops the floor. He works very hard. He makes the floor very clean. Then he wipes the table. Oops, the vase falls off the table and breaks! "Bad luck," Jacky says...