Everyone knows fire is useful,_____it's also dangerous.(A) but(B)_英语解答

Everyone knows fire is useful,_____it's also dangerous.
(A) but
(B) and
选择一个正确答案,并请说明理由

人气：423 ℃　时间：2020-01-16 08:36:48

解答

A,火useful是好处,dangerous是坏处.两者意思相反,一好一坏,所以用转折连词.