Задание 2. Выберите правильный вариант ответа: 1) Why are you tired? — I ___ all morning. 2) The plane ___ at 7:30 AM every weekday. 3) I ___ this song before. It sounds familiar. 4) Shh! The baby ___ right now. 5) She ___ for her keys since 8 AM. I think she lost them.

1. have been studying all morning — действие продолжалось всё утро.
2. The plane arrives at 7:30 AM every weekday — расписание.
3. I have heard this song before — опыт до настоящего момента.
4. Shh! The baby is sleeping right now — действие происходит сейчас.
5. She has been looking for her keys since 8 AM — действие длится с определённого момента.

Ответ: 1) have been studying; 2) arrives; 3) have heard; 4) is sleeping; 5) has been looking.