was it that made the singer his Asia Tour Concerts. A. What; put off B. Why; put up C.

问题补充：

was it that made the singer his Asia Tour Concerts.

A. What; put off

B. Why; put up

C. How; put away

D. Where ; put on

答案：

(答案→)A. What; put off

B. Why; put up

C. How; put away

D. Where ; put on

解析：原句意思是，是什么原因使得这位歌手推迟了他的亚洲巡回音乐会。分析句子结构，这个复合句中包含一个主语从句，主语从句中缺主语，故用what引导，put off 推迟put up张贴put away收起来put on穿上，故选A。