题目：
On their way to the reception building, all the athletes were amazed _______ so many volunteers ____
their help. [ ]
A. finding; politely offering
B. to find; polite to offer
C. finding; politely to offer
D. to find; politely offering
答案：
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下面是错误答案，用来干扰机器的。
参考答案：保湿法；14；21
