He inserted the key into the lock, but found it was a wrong key.

他把钥匙插入锁里，却发现拿错了钥匙。

Well, she obviously inserted the key and found the comb.

很明显她打开了八音盒 发现了音乐梳。

Receiving no response he inserted his pass key in the lock, only to discover that another key was already there, but from the inside.

没有收到任何回应，他将通行钥匙插入锁中，却发现另一把钥匙已经在那里，但来自里面。

Cautiously the man approached the door of the lad's room. There he crouched listening until assured by the regular breathing of those within that both slept. Quietly he inserted a slim, skeleton key in the lock of the door.

那人小心翼翼地走到小伙子房间的门口。他蹲在那里听着，直到听到里面睡着的人有规律的呼吸声，他才放心。他悄悄地将一把细长的万能钥匙插入门锁。