Oil is an important______material which can be processed into many different products.

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问题 Oil is an important______material which can be processed into many different products.

选项 A、raw
B、bleak
C、flexible
D、fertile

答案A

解析 raw意为“未加工的,原始的”;bleak意为“严寒的,阴郁的”;flexible意为“灵活的”;fertile意为“肥沃的”。
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