第一题：句号改逗号（下同），there改成where.
第二题：this 改成which.
第三题：改成：，though which you can learn a lot.
第四题：改写：，where you've made your dreams come true.
1 Go for a walk in the countryside,
where you can enjoy the beautiful
views and a peaceful atmosphere.
2 Spend time with your family and
friends,which will activate chemicals
in your brain to make you feel happier.
3 Try to accept your mistakes,through
which you can learn a lot.
4
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