题目内容：
)5.0
Mary is always ready to help others when they are in trouble and she never ____ their requests.
A)
turns up
B)
turns over
C)
turns in
D)
turns down
参考答案：
选择题：) 5.0Mary is always ready to help others when they
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5.0
Mary is always ready to help others when they are in trouble and she never ____ their requests.
A)
turns up
B)
turns over
C)
turns in
D)
turns down