问题描述：
i want to go on a holiday last December,but there were so many things_____.
A .for me to do B,for me to do them C.that I need to do D,I needed doing
我选了C ,很想知道为什么不能选C,请高人指教.
A .for me to do B,for me to do them C.that I need to do D,I needed doing
我选了C ,很想知道为什么不能选C,请高人指教.
问题解答：
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