高考英语中最易犯的100个错误（三）

12. He is one of those speakers who make his ideas perfectly clear.

定语从句的先行词是those speakers，为复数，因此从句中的指示代词应为复数，应把his改为their。

13. Whom do you think has left the lights on？

放在疑问句特殊疑问词后的do you think / believe / guess / imagine / suppose等都不参与句子成分，把它们去掉后，疑问词在句中做主语用主格，做宾语用宾格。本句中去掉do you think后缺的是主语，应把Whom改为Who。

14. The boss pretended not to see John and I.

John和I在句中都做的宾语，应把I 改为me。

15. These books are mine; those in the bag are her.

Her是形容词性物主代词，后面应该加名词books，或把her 改为hers。