2 . 1 picked up a wallet in my school and handed it to the head teacher, but no one has        it ever since.

A．spotted

B．sharpened

C．claimed

D．probed

4 . The problem with pencils is that you always have to ______(sharp) them often. (所给词的适当形式填空)

5 . He started to________(sharp) his knife. （所给词的适当形式填空）

6 . In Rio, the Chinese women’s volleyball team needed all of its fighting spirit after it was       to the “group of death”.

A．sharpened

B．cheated

C．seized

D．assigned

7 . After many years of wearing, the knife needs s________.（根据首字母单词拼写）

8 . 词性转换
1. science n.科学；自然科学→____________________n.科学家→____________________adj.科学的→____________________adv.科学上地
2. self n.自身；本身→____________________adj.自私的n.自私→____________________adj.无私的；忘我的
3. sense n.感觉→____________________adj.明智的；理智的
4. separate v.分离；分散→____________________n.分离；分开
5. serve v.提供；端上→____________________n.接待；服务
6. shame n.遗憾；羞愧→____________________adj.可耻的→____________________adj.羞愧的；惭愧的
7. sharp adj.锋利的；尖的→____________________v.变得锋利
8. silent adj.不语的；沉默的→____________________n.沉默；缄默
9. simple adj.简单的；简易的→____________________adv.简单地→____________________v.使简化；使简易
10. sleep v.睡觉→____________________adj.困倦的；瞌睡的

9 . A quick review of successes and failures at the end of year will help _________your year ahead.

A．shape

B．switch

C．stretch

D．sharpen