问题补充：
The Wolf and the Lamb so popular that some children went to see it for a second time.
Awere
Bwas
Chave been
Dhas been
答案：
A. were
(答案→)B. was
C. have been
D. has been
解析： 考查时态及主谓一致。句意：狼和小羊的故事如此的受欢迎以至于一些孩子又去看了一遍。The Wolf and the Lamb应看成是一个事物，做主语时谓语动词用单数形式，根据前后分句时态要保持一致，所以应用过去式选B。
