Its no secret to us but he alone is in the dark. It means .A. nobody but him knows the s

问题补充：

Its no secret to us, but he alone is in the dark. It means .

A. nobody but him knows the secret

B. we all know the secret except him

C. its so dark that he can see everything clearly

D. only the needs to keep the secret

答案：

A. nobody but him knows the secret

B. we all know the secret except him

C. its so dark that he can see everything clearly

D. only the needs to keep the secret

解析：in the dark表示“蒙在鼓里，一无所知”。