find the mistake
I’m sure she was telling the truth. Everyone said the same thing.
I don’t know where he is. It’s possible that he missed his train
E-mails don’t usually take two days to arrive. I’m sure she didn’t send it
I was out this morning. It’s possible that he tried to phone me then.
Surely he hasn’t finished his tea already. It was really hot.
I’m certain my little brother has hidden my calculator.
He’s always hiding things.

he always hides things.

i'm certain my small brother has hidden my calculator

surely he hasn't finished his tea yet.it was really hot.

I’m certain my little brother had hidden my calculator