The coats are 200 dollars each, but we offer a discount of 30%, you’ll get one for only 140 dollars.
A. though
B. unless
C. before
D. since
网友回答
A. though
B. unless
C. before
(答案→)D. since
解析：考察连词词义辨析。A尽管；B除非，如果…不…;C在…之前；D因为；句意：这些外套每一件都是200美元。但是因为我们打折百分之30，所以你只要140美元。根据句意说明D正确。