问题补充：
The experiment turned out to be , which wasn’t they wanted.
A. a completely failing ; as
B. a complete failure ; what
C. completely failure ; that
D. failed ; 不填
答案：
A. a completely failing ; as
(答案→)B. a complete failure ; what
C. completely failure ; that
D. failed ; 不填
解析：某些抽象名词具体化后变成可数名词,前可加冠词.failure在此意为“一次挫败的事”.第二空的what引导一个表语从句，what充当wanted 的宾语.
