1．It never occurred to me ______ you could succeed in persuading him to change his mind.
A．which B．what
C．that D．if
解析考查固定句型。It occurs/occurred to sb.that...是固定句型，意思是：某人突然想起……，其中that引导主语从句，故选C项。
答案C
2．When you get the paper back，pay special attention to what ______.
A．have marked B．have been marked
C．had marked D．had been marked
解析句意：当你拿回试卷时须特别注意已经标注过的部分。本题考查动词的时态，该句强调过去已经修改过的东西并强调对现在的影响，用现在完成时，又因其主语为what，所以用被动语态。故用现在完成时的被动语态。
答案B
3．A teacher should make his lessons simple enough for the students to ______.
A．take off B．take up
C．take in D．take down
解析考查词组辨析。句意：老师应该使他的课足够简单到让学生理解。take off起飞，成功；take up从事；take in吸收；take down记下。
答案C
