— Mary’s sister looks very beautiful now.
— But she was very ugly before she tidied up her appearance（整容）. You believe it!
A. shouldn’t
B. mustn’t
C. wouldn’t
D. might not
网友回答
A. shouldn’t
B. mustn’t
(答案→)C. wouldn’t
D. might not
解析：考查情态动词用法辨析。句意：—Mary的姐姐看起来很漂亮。—但在她整容之前她很丑陋。你不会相信的。Would会；should应该；must一定，必须；might也许；故C正确。