She acquired a knowledge of French by careful study.

　　她通过认真学习而学会了法语。

　　Mr.Brown acquired a fortune in the oil business.

　　布朗先生在石油业上发了财。

　　归纳拓展

　　acquired adj.后天的；(通过学习、经历等)获得的；已成习惯的

　　acquirement n．获得；学到；学到的东西

　　佳句背诵

　　(1)She has acquired some very unpleasant habits recently.

　　她最近养成了一些不良的习惯。

　　(2)The little boy acquired a large English vocabulary.

　　那个小孩学会了大量英语词汇。

　　3

　　...，so you may be able to concentrate on photography later if you're interested.因此如果你对摄影感兴趣，在以后的时间里你可以把精力集中在它上面。(回归课本)

　　用法点拨

　　I was sleeping badly and finding it hard to concentrate.

　　我没睡好，因此我很难集中注意力。

　　Luke wants to concentrate on his film career.

　　卢克想全力以赴投身电影事业。

　　归纳拓展

　　concentrate (sth.) on sth./doing sth.专心致志于某事/做某事

　　concentrate one's attention/efforts on sth.集中精力/全力以赴干某事

　　concentrated adj.集中的；浓缩的

　　concentrated fire集中火力

　　concentrated food浓缩食品

　　concentration n．集中；专心

　　完成句子

　　(1)You should concentrate_your_efforts(集中精力)on passing these exams.

　　(2)She lost concentration(不留神)for a moment and slipped.

　　4

　　You'll find your colleagues very eager to assist you，...你将发现你的同事们会热情地帮助你，......(回归课本)

　　用法点拨

　　We all assisted in planting trees on the hill in March.

三月我们都在山上帮助植树。