The flowers sweet in the botanic garden attract the visitors to the beauty of nature.
A. to smell
B. smelling
C. smelt
D. to be smelt
网友回答
A. to smell
(答案→)B. smelling
C. smelt
D. to be smelt
解析：由于attract作谓语，而且无连词，所以只能用非谓语形式填空。smelling sweet in the botanic garden是现在分词短语作定语，相当于定语从句that/which smell sweet。