你能根据句意和首字母准确地写出句中所缺的单词吗？

1.Be careful,or you'll cut your f_____.

2.You must improve your s_____.

3.We didn't have c_____in ourselves.

4.The boy always does his homework all by h____.

5.There are two girls.B_____ of them are students.

6.Yesterday they b_____the dictionary in the bookstore.

7.Don't write them down on a p____ of paper.

8.There is a big tree in f_____of our classroom.

9.These words were s____ wrong.

10.Let's draw a big c____ on the blackboard.