1 . His attention ________ (concentrate) on his experiment, so he had no time for his family. (所给词的适当形式填空)
→ ________, he had no time for his family. (with复合结构 )
→ ________, he had no time for his family. (独立主格结构)

2 . 如果你经常不吃早餐，你就很难在课堂上集中注意力。(trouble)
If you often skip breakfast, you will ________________in class.

3 . ______________________ , you should examine yourself and see if there is something wrong with your personality.
作为一个青少年，你应该全神贯注于学习。(concentrate)

7 . ________________ my autobiography.
我正在集中精力写我的自传。

8 . 词性转换
1. ______n. 国家；民族；国民→national adj.国家的→nationality n. 国籍；民族
2. ______n. 设计；设计方案 vt.设计；筹划→designer n. 设计师
3. ______adj.正式的；正规的→(反义词) informal adj.非正式的；不正规的
4. ______adj.焦虑的；不安的→anxiously adv.焦虑地；不安地→anxiety n. 焦虑；不安
5. ______vt.使恼怒；打扰→annoyed   adj.恼怒的；生气的→annoying   adj.令人恼怒的；令人生气的→annoyance n. 恼怒；生气
6. ______adj.惊吓的；害怕的→frightening adj.令人害怕的→frighten vt.使害怕
7. ______vt.使钦佩；给……留下深刻的好印象 vi.留下印象；引人注目→impression n. 印象；感想→impressive adj.印象深刻的
8. ______vt.&vi.集中(注意力)；聚精会神→concentration n. 集中；专心
9. ______adj.自信的；有把握的→confidently adv.自信地；有把握地→confidence n. 信心；信任

10 . 词性转换
1. ________n. 摄影师→photograph n. 照片，相片v. 摄影
2. ________v. （从糟糕经历中）恢复→recovery n. 恢复，痊愈
3. ________n. 吃惊，震惊→shocked adj. 吃惊的，震惊的；震撼的→shocking adj. 令人震惊的
4. ________n. 多样化，变化→various adj. 各种各样的，多方面的
5. ________v. 专注，专心→concentration n. 集中；专心，专注；关注
6. ________v. 突然停止，呆住→freezing adj. 极冷的
7. ________n. （对某一情形或事件的）反应→react v. 反应