问题
选择题
It took me a long time before I was able to fully appreciate what they__________for me.
A．had done
B．did
C．would do
D．were doing
答案
答案：A
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It took me a long time before I was able to fully appreciate what they__________for me.
A．had done
B．did
C．would do
D．were doing
答案：A
