2. 外语
  3. He was very sick and his life was hanging by a ______.

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

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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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