Over the past week a new TV show has a heated discussion among many young Chinese on the

问题补充：

Over the past week a new TV show has a heated discussion among many young Chinese on the Internet.

A. called off

B. set off

C. cut down

D. taken down

答案：

A. called off

(答案→)B. set off

C. cut down

D. taken down

解析：考查词组：A. called off取消B. set off出发，引发，引爆C. cut down减少，砍倒D. taken down记下，放下，句意：过去的一周，一个新的电视节目引起很多中国年轻人在网上的热烈讨论。选B。