He was very sick and his life was hanging by a ______.A、ropeB、threadC、cordD、s

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问题 He was very sick and his life was hanging by a ______.

选项 A、rope
B、thread
C、cord
D、string

答案 B

解析固定搭配题。hang by a thread是习惯用语，意为“千钧一发，危在旦夕”。

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