There is a(n) bus service into the center of town, which makes it much easier for farmers to go to sell their vegetables there.
A. frequent
B. gradual
C. official
D. fluent
网友回答
(答案→)A. frequent
B. gradual
C. official
D. fluent
解析：形容词辨析。A频繁的；B逐渐的；C官方的，正式的；D流利的；句意：去市中心有很多公交车的，这让农民们进城买蔬菜更为容易和便利了。根据句意说明A正确。