单项选择题
Oil is an important（）material which can be processed into many different products, including plastics.
A.uncovered B.raw C.fresh D.crude
单项选择题 I had my meals（）when I was ill in bed with a bad cold.
单项选择题 Professor Smith promised to look（）my paper, that is, to read it carefully before the defence.
单项选择题 Our house is about a mile from the railway station and there are not many houses（）.
