题目内容
13．Windows __________ glass．（ ）| A． | are made of | B． | are made from | C． | are made in | D． | are made into |
分析 窗户是由玻璃做成的．
解答 答案：A．考查动词短语．句意"窗户是由玻璃做成的．"be made of是指不经过加工，能直接看出原材料；be made from是指经过加工，不能直接看出原料；be ade into制作成…．根据题干Windows __________ glass．可知是窗户是由玻璃做成的．故选A．
点评 了解各个选项的含义及其区别，根据具体内容作答．
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