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1. This city had an old building, but none can be found nowadays.
There used . 

2. “I′ll finish it by the end of this week,” he said.
He promised . 

3. I would rather watch TV than go to the cinema.
I prefer . 

4. I don′t have enough money, so I can′t buy a computer.
If . 

5. You will pass the exam if you study harder.
Unless you .