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1. It's not a /an watch. It’s got hands.
2. If you play this stereo on volume, you’ll go deaf!
3. It’s not a /an experiment. In fact, it’s really simple.
4. Are leather chairs more comfortable than ones?
5. There aren’t any windows in the lab, so all the light is
6. Was it a /an decision, or had you thought about it for a long time?
7. The lights are - they come on when you enter the room, and go off when you leave.
8. Each person’s fingerprints are No two people have the same fingerprints.
9. The number of patients necessary to test the new drug is 50. Any less than that and the scientists won't know if it works properly or not.
10. I can’t remember the year it was discovered, but it was around 1976.
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