【练习】根据句子的意思在括号里填入适当的词。

1). Someone ______ you this note while you were out.

2). After the earthquake, little ______ of the village.

3). He used the ______ money to buy a dictionary.

4). After buying the dictionary, he had not much money______.

5). Arriving home, I found that I' d ______ my key in the office.

6). Don' t leave her ______ (wait) outside in the rain.

7). She remained _______ (change) after all these years.

8). A great many things remain _______ (do).

Keys: 1). left 2). remained 3). remaining 4). left

5). left 6). waiting 7). unchanged 8). to be done 4. climate / weather 【解释】

climate指从长时间的范围来看某地的平均气候或经常性的气候；

weather指某地一时的天气，如寒暖、晴雨和干湿的变化情况。 【练习】根据句子的意思在括号里填入适当的词。

1). We shall go out for a picnic tomorrow if the _______ is fine.

2). A drier _______ would be good for your health.

3). I couldn't imagine what it would be like to live in a hot ________.

4). The _______ of our country is mild, but individual places experience bad ________.

Keys: 1). weather 2). climate 3). climate 4). climate; weather 5. now that / since / because / as 【解释】

都可引导原因状语从句，语气最强的是because，引导直接而明确的原因，也用来回答why的问句或用于强调句型；其次是since/now that，表示已知或明显的原因，再次是as，引导的原因是不言而喻、显而易见的；for引导的是并列分句，表推测或判断的原因，前面有逗号隔开。 【练习】根据句子的意思在括号里填入适当的词。

1). _______ everybody is here, let's begin our meeting.

2) It was _______ he was ill that he didn' t go to school.

3). It must have rained last night, _______ the ground is all wet.

4). _______ we are alone, we can speak freely.

Keys: 1). since/now that 2). because 3). for 4). Now (that)

Ⅱ.词性变化（旨在提供语法填空所需材料）

1. violent adj.强暴的，猛烈的 violence n.暴力，强暴；猛烈 violently adv. 强暴地；猛烈地 2. fundamental adj.基本(础)的n.[pl.]基本原则(法则) fundamentally adv. 基本地；根本地 fundament n. 基础；根本 3. development n.生长，发

展；新情况 develop vt.发展；产生

vi.生长；发展 developed adj. 发达的developing adj. 发展的 4. lay vt.放下；摆设；产(蛋) lay---laid---laid---laying lie vi. 躺，平放；位于

lie---lay---lain---lying lie n.&vi. 谎话；说谎

lie---lied---lied---lying 5. prevent vt. 预防，防止 prevention n.预防；阻止；妨碍 preventable adj.可防止的，可预防的 6. gentle adj.和蔼的；轻柔的 gently adv.温和地；静静地 7. physics n.物理，物理学 physicist n.物理学家 physical adj.身体的；物理(学)的；物质的 【练习】用括号内所提供词的适当形式填空。

1). The naughty boy _______ (lie) to me that the hen that _______ (lie) there just now had ______ (lay) two eggs the day before.

2). In my opinion, ________ (prevent) is more important than treatment.

3). Some programs on the Internet are full of ________ (violent) and sex.

4). With the ________ (develop) of modern industry, more and more pollution is caused.

5). China is a ________ (develop) country belong to the third world.

6). There are ________ (fundament) differences between your religious beliefs and mine.

7). His ambition is to become a great ________ (physics).

Keys: 1). lied; lay; laid 2). prevention 3). violence 4). development

5). developing 6). fundamental 7). physicist