问题补充:
The flowers sweet in the botanic garden attract the visitors to the beauty of nature.
A. smelling
B. smelt
C. to smell
D. to be smelt
答案:
(答案→)A. smelling
B. smelt
C. to smell
D. to be smelt
解析:句意:植物园里的这些花闻起来非常甜吸引了参观者来欣赏大自然的美。这里整个句子有动词attract,所以空格处需用非谓语动词,这里smell是系动词没有被动,故选A。