1. and表示添加，用于连接词、短语或句子

My grandpa gave me a watch, which is made of gold, and which I keep to this day. 我的祖父送给我一只手表。这是一只金表，而且我一直保存至今。

In some areas of the United States, unfavorable climate and soil make farming an impossible task. 在美国的有些地区，不利的气候和土壤使耕作成为无法进行的工作。

2. and表示顺序，用于连接词、短语或句子

Cayenne pepper comes from the seedpod of the pepper plant, which is dried and then ground. 辣椒粉是由辣椒的籽皮弄干后经研磨而制成的。

3. and表示对比，用于连接词、短语或句子

Graphite conducts electricity and does not burn. 石墨导电，却不可燃。

4. and表示结果，用于连接短语或句子

Five minutes earlier, and we could have caught the last train. 如果提前5分钟，我们就能赶上最后这班火车了。

5. and用于固定搭配

Brook Farm in West Roxbury, Massachusetts, was an experiment in group living that flourished between 1841 and 1847. 建在马萨诸塞州西罗克斯伯里的布鲁克农场，是红火于1841年至1847年的一次群体生活的实验。

1.Protein digestion begins in the stomach _________ ends in the small intestine.

2.No creature __________ abused more often than ……

A. is being praised and

B. is praised nor

C. has been praised or

D. has been praised and

3.He asked a number of important critics to come __________ his private……