听力原文：Had I known you didn't have a key, I wouldn't have locked the door. Which is true about the speaker's implication? A.I knew you have a key. B.I'm sorry I locked the door. C.I'm sorry I didn't lock the door. D.I didn't know you have a key.
A.Which B.I C. B.I'm D. C.I'm E. D.I
【参考答案】
B 解析：语法题。原文意思是“如果我知道你没钥匙，就不会锁门了。”由此可见，选项B“很抱歉我把门锁上了”与原文意......