you tried it on you can’t imagine how pretty the new style skirt is.A. UnlessB. Because

问题补充：

you tried it on, you can’t imagine how pretty the new style skirt is.

A. UnlessB. Because C. If

答案：

解析：句意：除非你穿上这款新的衬衫，否则你不能想象，它有多么漂亮。分析：unless除非；because因为；if如果。分析：unless = if not.结合两句的句意只有除非之意符合。故选A