--What's the best way of losing weight?--________.A.Why not playing games?B.Why don't you play games?C.I advise you to playing games.D.You'd better to play games.
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B解析选项A应为Why not do sth.?,选项C应为advise sb. to do sth.,选项D应为had better do sth.。只有选项B符合要求,Why don't you do sth.?