根据句意和汉语或首字母提示，填写单词。
1. Our head teacher _____ (提供) us some useful advice.
2. You shouldn"t _____ (拒绝) to help him with his English study.
3. My grandma _____ (遮盖) the table with a cloth just now.
4. The experience as a volunteer is _____ (有帮助的) to him.
5. Lisa got dressed and ran _____ (顺楼梯而下) quickly.
6. She fell down and hurt her right k _____.
7. He put all the books on the s _____.
8. The old farmer dug (挖) a hole two feet d _____.
9. Your answer to the question is not c _____.
10. —What"s wrong with you?
      —My arms h _____.