長難句：however,when two monkeys were placed in separate but adjoining chambers, so that each could observe what the other was getting in return for its rock, their behaviour became markedly different.

重點詞匯：so that,markedly

■答案■

1、長難句： 但是，當兩個猴子被放在隔開但相鄰的兩個房間里，能夠互相看見對方用石頭換回來什么東西時，猴子的行為就會變得明顯不同。

分析： 本句是一個復合句，開始是when引導的時間狀語從句，其中包含so that 引導的目的狀語從句，而observe后面又是what引導的賓語從句；最后是主句their behavior become markedly different。

2、so that是一個連接詞，在英語中十分常見，可以表示目的。how do you raise your children so that they will have healthy relationships?（你怎樣培養孩子，以便使他們能夠建立健康的個人關系呢？） markedly意為“明顯地，顯著地”，其形容詞形式為marked。he showed a marked lack of interest.（他表現出明顯的興趣不足。）