Scientists have discovered a close______ between smoking and several serious diseases.

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问题 Scientists have discovered a close______ between smoking and several serious diseases.

选项 A、action
B、connection
C、union
D、combination

答案B

解析这四个名词中三个以一tion结尾，一个以一ion结尾。action意为"行动"。connection意为"联系"。union是"联合"的意思。combination意为"结合"。只有B项(意为"联系")符合本句上下文的意思。译文：科学家们已经发现吸烟和好几种疾病有着密切的联系。

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