【推荐1】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

【推荐2】I have just given you 20 very practical ways to s_______(使敏锐) your mind. (根据中英文提示单词拼写)

【推荐3】After many years of wearing, the knife needs s________.（根据首字母单词拼写）

【推荐1】It is hard to imagine a student f_____________ his attention on the textbook while others are playing.

【推荐2】We spend the days ______ (观光) and the evenings sitting in the bars drinking the local wine.

【推荐3】To make the room more beautiful, all the old carpets need r _______.（根据首字母单词拼写）