1. Many people say brown rice (is much healthier than white rice).
2. To stay fit, sleeping (is as meaningful as doing exercise).
3. It is said that the more you chew, (the less you eat).
4. Jogging is (one of the most popular forms) of exercise.
英文の和訳は、まずご自分でやってみてください。
その上で、もし分からないところがあれば、それに関して回答を求めれば良いと思います。
Don't be afraid of making mistakes because we can learn a lot from them.