That is why I liked it. The butler must have stolen the jewels

We shouldn’t have turned left. We have missed the turning/ we followed the instructions.
We didn’t have to wear uniforms at school. But I never did/ That is why I liked it.
The butler must have stolen the jewels. He was ordered to/ There is no other explanation.
You could have phoned from the station. I’m sure you did/ Why didn’t you?
You needn’t have bought any dog food. There isn’t any/ There is plenty.
Ann might not have understood the message. I suppose it’s possible/ She wasn’t supposed to
You can’t have spent all the money already! You were not able to/ I am sure you haven’t