ПОМОГИТЕ ПОЖАЛУЙСТА СРОЧНО УМОЛЯЮ ДАМ 25 БАЛЛОВ ПОЖАЛУЙСТА ​

① I feel better if I do some exercise every day.
② If Dave is thirsty, he always drinks water.
③ I get very tired at school if I go to bed late.
④ My dad doesn’t sleep well if he drinks coffee before bed.
⑤ If you buy an e-book reader, you can download hundreds of books.
⑥ Does your teacher get annoyed if you don’t do your homework?
⑦ If you switch off the lights, you save electricity.
⑧ If you use your mobile to surf the Net, the battery runs out quite quickly.