第四部分（共三节，满分35分）

第一节：单词拼写（共10小题，每小题1分，满分10分）

1.Many rare animals are in d________, because they are being hunted for

2. While reading, please pay much a__________ to your pronunciation.

3. After some years, he has f__________ the habit of having a walk after supper.

4. It's still u__________ whether he will come or not.

5. It is o__________ that he has known the story.

6. What he said r_______me of my old friends.

7. We must keep the b___________ of nature.

8. Some boys like to play j_________ on the others

9.He earned his l________  by selling newspapers.

10.People will clean graves and light incense in m________ of their ancestors.

冠折露髓后，行活髓切断的成功关键是（）

A.揭顶完全

B.止血彻底

C.无菌操作

D.放盖髓剂

E.定期观察