12. House Key

A: I forgot my house key!

B: How are we supposed to get into the house?

A: I hid a spare key in case this happens.

B: Let me guess: it's under the mat?

A: How did you know?

B: It's the most obvious hiding place.

A: I didn't know where else to put it.

B: There's a lock that allows you to hide keys in it.

A: Wow, really? That sounds like a good invention.

B: My teacher has one for his room key.

A: Of course, the best solution would be not to forget the key.

B: Definitely. Be more careful next time!