根据下列各句句意及所给单词的首字母或汉语意思，在句首写出该单词的正确形式。
1. I’ve always been very ______ (谨慎的) about giving my address to strangers.
2. Fold the letter and put it in an ______ (信封).
3. Any creature who ______ (拥有) one of these rings has great power.
4. He considered that the change could be ______ (有益的) to her health.
5. I was ______ (享有) with a happy childhood, one that most people would want to have.
6. The man was one of the s______ from the earthquake.
7. Whenever you are in trouble, don’t h______ to ask me for help.
8. The situation at Omaha Beach was so bad that the US army commanders thought about a_____
the invasion.
9. Please don’t i______ me when I am talking.
10. In Haiti, new difficulties have a______ after the earthquake.