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單項(xiàng)選擇題

Oil is an important（）material which can be processed into many different products, including plastics.

A.uncovered
B.raw
C.fresh
D.crude

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單項(xiàng)選擇題

I had my meals（）when I was ill in bed with a bad cold.

A.tobring
B.bring
C.brought
D.bringing

單項(xiàng)選擇題

Professor Smith promised to look（）my paper, that is, to read it carefully before the defence.

A.after
B.over
C.on
D.into