在B句空缺处填入适当的单词，使完成后的句子与A句意思相同或相近，每空一词。

1.A:He built a transparent wall and he could observe what went on inside through it.

B:He built a transparent wall 　　 　　 he could observe what went on inside.

10.The typical difference between humans and chimpanzees is that chimpanzees

　have 　 toes.

9. 　　is the science that deals with mental processes and behavior.

8.Londoners talk more about the　　 weather.

7.When you go to a new country,you must have　 　to new manners and customs.

6.He often doubts his 　 as a husband and father.

5.Professor Wang gave the political situation a　　 definition.

4.You can’t see animals in their natural　 　at a zoo.

3.American　　 that the Iraqi War would end quickly proved wrong.

2.The explanation in the footnote　 　the difficult sentence.