Ответ:
Краткое пояснение: В данном упражнении нужно вставить слово "by", если это необходимо по смыслу. Если нет, то ничего не вставляем.
- I waited for 40 minutes by myself.
- Please help yourself!
- Alexa didn't have any brothers or sisters, so she was used to being herself.
- The children are too young to go out themselves.
- Ben always covers himself in sun cream when he goes out in the sun.
- I really hope we enjoy ourselves.
Ответ: