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Illat it means the same as the sentence before
1. The Opera House has very comfortable seats. = many
=> There
2. They have learnt English for five years. They have learnt French for five years.too
=> They
3. Be careful or you'll hurt yourself.
=>If you
4. We are interested in collecting dolls
=> We love
5. They didn't go camping yesterday because it rained heavily.
=> It rained heavily.