A decision has been made the new school building be built next month.A. whyB. howC. wheth

问题补充：

A decision has been made the new school building be built next month.

A. why

B. how

C. whether

D. that

答案：

A. why

B. how

C. whether

(答案→)D. that

解析：

主要测试同位语从句。decision决定后面的名词性从句应该用should + 原形动词，并且should可以省略，句子中就省略了。译文：已经做出决定，新的教学楼下个月完工。