Put the elements into the gaps

• spend enough time in the sunlight
• bicycle riding
• Getting enough sleep

There are a lot of different ways to stay healthy in the summer. First, it's very important to [ ] because this would help you get enough vitamin D. Most people prefer staying on the beach to do that, but you can just have walks under the sun with your friends. Then, summer is a great time to go [ ] with your family. The only thing you need is your bike, and it's good exercise too! [ ] is also very important because your body and mind need to rest after a long busy day.