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1. G was once much used for lighting and is now used for cooking and heating.
2. Modern life depends on good t .
3. Eating too much c is bad for your teeth.
4. We should learn much more history k .
5. They are waiting for their friends on the p at the station.
6. He always has some d ideas in his mind.
7.I have collected a few a coins these years.
8. They'd like to d their. rooms with a Christmas tree and some fresh flowers.