题目内容
Lei Feng is always ready to help others when they are in trouble and he never _______ their request.
A. turns up B. turns over C. turns in D. turns down
选D。本题考查短语动词的区别。turn up的意思是“将音量调高”、“出现,露面“;turn over意思是“打翻,移交;翻身”;而turn in表示“上交”;turn down表示“将音量等调低或拒绝”的意思。结合上下文的意思应该选D。
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