4．The total cost of their trip to Canada ________ $5,000.

A．added up to　 B．added up　 C．added to　 D．was added up to

解析：add to意为“增加”；add up to意为“总计；加起来到”，不用于被动语态。

答案：A

3．The country life he was used to ________ greatly since 2004.

A．change　 B．has changed　 C．changing　 D．have changed

解析：句中的he was used to作定语从句，修饰前面的country life。句意是“他习惯的农村生活从2004年开始发生了很大的变化”。

答案：B

2．It’s clever ________ to make a mistake and correct it in no time.

A．for her　 B．of her　 C．by her　 D．by herself

解析：句意：“她犯了错误立即给予纠正，太聪明了。”考查动词不定式的逻辑主语。she is clever...，显然答案是B。

答案：B

1．I liked the picture ________，the more I looked at it.

　 A．better　 B．the better　 C．best　 D．the best

解析：“the+比较级．..，the+比较级”结构中，比较级若置于句中，省略the。

答案：A

10．There’s a ________(留言)from Karen on the phone.

答案：1.method　2.equipment(apparatus)　3.Gravity　4.expands　5.electricity　6.rust　7.reacts；oxygen　8.astonished　9.lecture　10.message

9．Yesterday Professor Wang gave us a l________ in Beijing University.

8．Hearing the astonishing news，everyone present had an a________ look on each face.

7．Which of the metals in the table ________(反应)the most with ________(氧气)and water?

6．Iron does not r________ in air­free water.

5．We use ________(电)to provide power for machines.