The exhibition he had been looking forward to was until next Sunday.A. visit; put offB.

问题补充：

The exhibition he had been looking forward to was until next Sunday.

A. visit; put off

B. visiting; put off

C. visit; put on

D. visiting; put on

答案：

A. visit; put off

(答案→)B. visiting; put off

C. visit; put on

D. visiting; put on

解析：考查动名词做宾语和词组辨析：look forward to doing渴望做…，第一空填visiting，put off推迟，put on穿上，句意：他一直盼望参观的展览被推迟到下个星期天。选B。