603.The early warning of floods,_______ over the radio and on TV，spread quickly through the area.
A.having broadcast
B.broadcasting
C.broadcast
D.to be broadcast
604.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
603.答案是C;根据下文spread quickly暗示，警报早已被播出。
604.答案是B;连系动词smell与flowers直接为主动关系，故用现在分词作定语。
