根据句子意思，用括号中所给单词的正确形式填空。(每空限填一个单词)
Alice fell for a long time, and then she found        (she) alone in a long, low hall.
Some people think that wolves are dangerous to        (human).
The exam is much        (easy) than we expected. Great!
We should use our pocket money       (wise).
Neil Armstrong is the first man to walk on the Moon. It was brave of him to go to a place that was        (know) to people at that time.