根据句子意思，用括号中所给单词的适当形式填空。
1. Do you know who is the first woman ________ (reach) the top of the South Pole?
2. He did make his way back to his home ________ (successful) in the end.
3. Yang Liwei is the ________ (proud) of our nation.
4. Many scientists devote themselves to space ________ (explore).
5. Armstrong got the Medal of Freedom for his ________ (serve).
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