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I - 1. It was raining heavily, so we had to stay at home.
2. Everyday people cut thousands of trees in the world.
3. It is thought that doing morning exercises is good for health.
4. Going swimming in the rivers in the summer is interesting.
5. Shall we play tennis together in the afternoon?
6. She wasn't seen at all.
7. The sister asked Tom if he was hungry.
8. Walking home late in the evening is dangerous.
