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 — Can I get you a cup of tea—（）
单项选择题 — Mike injured his leg playing football yesterday. — Really?（）
单项选择题 —（） — He teaches physics at a school.
