Rewrite the sentences so that the meaning doesn't change

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B. Rewrite the sentences so that the meaning doesn't change
1. She started reading books when he was in grade 1.
=> She has.
2. The last time I visited Da Nang 4 years ago.
=>I haven't..
3. The last time she donated blood 1 year ago.
=> She hasn't.
4. When did you start your hobby?
=> How long..
5. I haven't eaten sea food before.
=> This is