Milu deer which used to be in China long ago is a rare animal nowadays.A. ordinaryB. comm

问题补充：

Milu deer，which used to be in China long ago，is a rare animal nowadays.

A. ordinary

B. common

C. popular

D. usual

答案：

A. ordinary

(答案→)B. common

C. popular

D. usual

解析：形容词辨析。A普通（指没有特别之处）；B常见（指经常可见）；C受欢迎；流行；D通常，平常；句意：很久之前在中国很常见的麋鹿现在是一个很罕见的动物。根据句意说明B正确。