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I'm sure that David took your books by mistake. David ....
David must have taken your books by mistake.
Oops!
Okay!
I'm sure that Brenda isn't over thirty. Brenda.....
Brenda can't be over thirty.
Oops!
Okay!
You needn't come with me if you don't want to. You .....
You don't have to come with me if you don't want to.
Oops!
Okay!
I think it was the cat that took the fish from the table! The cat .....
The cat must have taken the fish from the table.
Oops!
Okay!
It was unnecessary for you to clean the floor. You....
You needn't have cleaned the floor.
Oops!
Okay!
It would be a great idea if Harry took a holiday. Harry ....
Harry should take a holiday.
Oops!
Okay!
It's possible for anyone to break into this house! Anybody .....
Anybody can / could break into this house!
Oops!
Okay!
You're not allowed to park here. You .........
You can't / mustn't park here.
Oops!
Okay!
What would you advise me to do? (think)
What do you think I should do?
Oops!
Okay!
Heather possibly hasn't left yet. Heather...
Heather might not have left yet.
Oops!
Okay!
Mary knows how to stand on her head. Mary ...
Mary can stand on her head.
Oops!
Okay!
It was a mistake to park outside the police station. You ....
You shouldn't have parked outside the police station.
Oops!
Okay!
Do I need a different driving licence for a motorbike? Do I ......
Do I have to have a different driving licence for a motorbike?
Oops!
Okay!
Jack is supposed to have arrived half an hour ago. Jack ...
Jack should have arrived half an hour ago.
Oops!
Okay!
The dentist will see you soon. I don't think he'll be long. // The dentist will see you soon. He .....
He shouldn't be long.
Oops!
Okay!
I'm sure that Helen feels lonely. Helen.....
Helen must feel really lonely.
Oops!
Okay!
I'm sure they haven't eaten all the food. It's not possible! They ....
They can't have eaten all the food.
Oops!
Okay!
It was a waste of time worrying, after all! You ....
You needn't have worried after all!
Oops!
Okay!
Perhaps Pam and Tim decided not to come. Pam and Tim ....
Pam and Tim might have decided not to come.
Oops!
Okay!
I'm sure that Liz hasn't met Harry before. Liz ...
Liz can't have met Harry before.
Oops!
Okay!
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