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I'm sure he's thinking about switching jobs.
I'm sure that app is free.
I'm sure that issue is already resolved.
I'm sure they made up.
I'm sure she's been really busy lately.
I'm sure it's out of stock.
I'm sure the slots are all booked.
I'm sure he apparently overslept.
I'm sure that movie is already out.
I'm sure rent is high around here.
I'm sure he's working from home today.
I'm sure she passed the exam.