_____all our kindness to help her, Sara refused to listen. A．at B.in C. for D. on 选什么

_____all our kindness to help her, Sara refused to listen. A．at B.in C. for D. on 选什么

C
再说几个列子帮你理解吧：(注意第一个例子中的for your kindness)
kindness: n. 仁慈,好意
例句与用法:
1.How can I ever repay you for your kindness?
我该怎样才能报答你的好意呢？
2. I can never repay her many kindnesses to me.
我无法回报她对我的许多帮助。
3. She always shows kindness to children and animals.
她对孩子和动物总是很温柔。
4. He did it entirely out of kindness, not for the money.
他做那件事纯粹是出於好意, 并非为钱.
5. I will never forget your kindness.
我永远忘不了你的好意。
6.I think it would be a kindness to tell him the bad news straight away.
我认为直截了当地告诉他这个坏消息倒是友好的行为。
7. Your kindness quite overwhelmed me.
你的好意使我感激难言。
8. Your kindness is grateful.
你的友善令人感激

c

listenin 这里表示拒绝听我们的善意的帮助， at表示地点，for是留意，on是在…… 希望对你有帮助哦

for all=in spite of 不管、尽管的意思。这句话是说尽管我们好心好意帮助她，（但是）sara不听我们的。