单词拼写。

根据汉语或首字母提示用正确的单词形式填空

1. All of us ________ (羡慕) the school for its excellent teaching at that time.

2. Mankind has been trying every means to keep the b______ of nature.

3. The lake in our village is s________ by many tall trees.

4. The reasons for his actions have remained a _________ (谜)to us.

5. He has ____________ (咨询)the physician about his health

6. He was in a v__________ temper and began throwing things about.

7. How can you a______________  for your absence last night?  

8. Water ____________(存在) in three forms, which are liquid, gas and solid.