23. A. start with 　　　　　　　　 B. insist on 　　　　　　　　 C. object to　　 　　　　　 D. end up

22. A. prefers　 　　　　　　　　　 B. devotes 　　　　　　　　　 C. contributes　 　　　　　 D. addicts

21. A. coincidence　　　 　　 B. challenge　　 　　　　　 C. difficulty　　　　　 D. puzzle

3. [原句]Born into a poor farmer’s family in 1930, Dr Yuan graduated from Southwest Agricultural College in 1953. 1930年出生于一个贫穷的农民家庭，，袁博士于1953年毕业于西南农业大学。

　[模仿要点] 句子结构： 过去分词作状语，+ 主句

[模仿1]配备了电子词典，学生觉得学习英语更容易和更方便了。

_______________________________________________________________________________

答案：Equipped with electronic dictionaries, students find learning English much easier and more

convenient.

[模仿2]位于城市的中心地带，这座公园给市民带来很多享受。

_______________________________________________________________________________

答案：Located in the centre of the city, the park provides much enjoyment to the citizens.

2．[原句]Dr Yuan Longping grows what is called super hybrid rice.袁隆平博士种植被称之为高产量的杂交水稻。

　[模仿要点] 句子结构：主句+what/whatever 引导的宾语从句

[模仿1]学生喜欢生活中如何新的东西。

_______________________________________________________________________________

答案：Students enjoy whatever is new in their life.

[模仿2]通过考试，学生可以了解他们的弱点从而更加努力学习。

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答案：Through exams, students will learn what their weak points are and then study even harder.

2. This special strain of rice makes it possible to produce one-third more of the crop in the same fields. 这种特殊的稻种使得同样的田地多收获三分之一的产量。

[解释] make it + 宾语补足语 + 动词不定式, it 做形式宾语,动词不定式是真正的宾语，有时

真正的宾语是从句。常和动词consider/think/make/find/believe/declare/feel/guess/imagine/prove

等连用。如：He felt it his duty to take good care of them. 他感觉到好好照顾他们是他的责任。

再如：

1). The bad weather makes it impossible for us to go for a picnic.

2). We make it a rule to do some English practice before class.

3). Tom found it very embarrassing to be reminded of the long-standing debt.

4). Do you find it funny to see someone sliding on a banana skin?

[练习] 翻译句子。

1). 我们觉得支持好的领导是我们的职责。

　 ___________________________________________________________________________

2). 我记得我想你讲清楚我不会来的。

　 ___________________________________________________________________________

Keys: 1). We consider it our duty to support good leaders.　

2). I remember I made it clear to you that I was not coming.

1. In 1974, he became the first agricultural pioneer in the world to grow rice that has a high output. 1974年，他成了世界上第一位种植高产水稻的农业先锋。　

[解释] 不定式放在表示次序的词the first, the last, the best以及the only, the very, the right等词后面, 且这些词与动词不定式有逻辑上的主谓关系，结构为：the first/last/best/right/only/very/... + n. + to do sth.第一个/最后一个/最好的一个/合适的/唯一的/恰好的……做某事的人/物，如：

1). He is always the first (student) to come and the last to leave. 他总是第一个来和最后一个离开的(学生)。

2). The last man to leave the sinking ship was the captain. 最后一个离开正在下沉的船的是船长。

[练习] 根据句子意思填空。

1). I think he is the right person ________ (tell) her about this.

2). I’ d be the first ________ (admit) I might be wrong.

Keys: 1). to tell 　　　2). to admit

7. keep...free from/of = protect sb./sth. from... 使……免受(影响/伤害)；使……不含(有害物)　　　

[典例]

1). We should keep ourselves free from drugs. 我们应该远离毒品。

2). I hope you will keep yourself free from tobacco and alcohol. 我希望你不抽烟不喝酒。

[练习] 根据句子意思填空。

1). We’ ve managed to ________ the garden ________ ________weeds this year.

2). Relaxation exercises can ________ your body ________ ________ tension.

Keys: 1). keep; free of 　　2). keep; free of

VI 重点句子 (旨在提供句子结构等所需材料)