It is an open secret _____he is not a qualified manager.
单选题 (10 分) 10分
A.
that

B.
which

C.
what

答案解释: 答案：A 译文：他不是个称职的经理，这是个公开的秘密。 解析：it作为形式主语，真正的主语为he is not a qualified manager，因此用连接词that引导，