依次填入下面这段文字横线处的语句，衔接最恰当的一组是达·芬奇的《蒙娜丽莎》成功地塑造了资本主义上升时期一位城市中产阶级妇女形象。 ，不少美术史家称它为“神秘的微笑”。①特别是微翘的嘴角和舒展的笑肌②画家以高超的绘画技巧，展现了这位女性脸上掠过的微笑③画面中的蒙娜丽莎呈现着微妙的笑容，眉宇间透出内心的欢愉④据记载，蒙娜丽莎是佛罗伦萨一位皮货商的妻子，当时年仅24岁⑤这正是古代意大利中产阶级有教养的妇女特有的矜持的美好表现⑥使蒙娜丽莎的笑容平静安详而又意味深长

day, I came across my former classmate, but hisname ______ me, which made me embarrassed.

Most people advisethat students’ heavy burden __________.

My brother’s pale face suggested that he ______ ill, and my parents suggested that he ______ some medicine .

Do you know the most ancient city in China—Xi’an well?—No，this is the first time I ________ here