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.

不属于快速进展型牙周炎的主要致病为（）。

A.牙龈类杆菌

B.中间型类杆菌

C.伴放线放线杆菌

D.侵蚀艾肯菌

E.聚核梭杆菌