[学 以 致 用]
On casual Fridays，employees may wear clothing which is classified as“business casual”，meaning that it still obeys certain standards.Clothing must be clean and in good repair，with no spots or
discolorations(变色)．Men are generally allowed to wear casual trousers and brightcolored clothes，and in some offices they may be allowed to wear buttondown shirts or polo shirts，with or without a tie.Women tend to wear neat skirts or dresses；casual trousers are common and generally perfectly，acceptable，except in very conservative workplaces.
Generally speaking，on casual Fridays as a worker in a company you can wear________.
A．jeans
B．tank tops
C．shorts
D．polo shirts
答案 D [根据题干中的“on casual Fridays”和“you can wear”，我们可在第三句中找到正确信息，只有D项被包含在便装星期五允许职工穿的衣物范围内。]