Jack is preparing for the IELTS so he has to his visit to BeijingA. take offB. put offC.

问题补充：

Jack is preparing for the IELTS, so he has to his visit to Beijing．

A. take off

B. put off

C. turn off

D. give off

答案：

A. take off

(答案→)B. put off

C. turn off

D. give off

解析：本题的含义是杰克正在为雅思考试做准备，所以他必须推迟到北京的参观，put off表示推迟的含义，故本题选B。