since
for
over
before
Answer is Right!
Answer is Wrong!
The answer is since.
- Since is used to indicate the beginning of an event or action. In this case, the eagle has been flying in the sky since last week.
- For is used to indicate the duration of an event or action. In this case, the eagle has been flying in the sky for a week.
- Over is used to indicate a distance or a period of time. In this case, the eagle has been flying over the sky.
- Before is used to indicate a time that is earlier than a particular point in time. In this case, the eagle was not flying in the sky before last week.