问题
选择题
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
答案
答案：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。