单词拼写。
根据下列句子所给首字母或汉语注释，写出空缺处单词的正确形式。（每空一词）
1. Keep calm, and try not to ________(惊慌).
2. The witness _________(起誓) that what she said was true.
3. I'm sure they won't feel ________(失望).
4. He _______ (强调)the importance of protecting the water resources in his speech at the Earth Summit.
5. I'm not interested in the ________(内容) of this website.
6. Facing so many dangers, the man still kept_____(镇静).
7. He hasn't yet ________(恢复健康) from his disease.
8. Winter vacation is ________ (靠近). I can't wait to go back home.
9. This was a _____(激烈的) battle in which both sides suffered heavy losses.
10. People are required to pay for their ________(购买) before they leave the supermarket.