问题补充：
----People should stop using their cars and start using public transport.
---- . The roads are too crowded as they are.
A. All right
B. Exactly
C. Go ahead
D. Fine
答案：
A. All right
(答案→)B. Exactly
C. Go ahead
D. Fine
解析：词义辨析。All right行，可以，好吧；Exactly准确地，确实的；Go ahead去吧，干吧；Fine好的。句意：人们应该停止使用私家车，开始使用公共交通工具。确实应该如此。道路太拥挤了。选B。
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