Underline the correct phrase. 1. I've been writing and sending letters already/all day
2. We 've employed twenty new workers in the last three weeks/for months.
3. You've answered five questions in the last hour/for an hour
4. I've been asking them about this for days/three times.
5. They asked me really difficult questions at the interview/over the interview.
6. She's had loIs of interviews over the years/hour.
7. They've interviewed 10 people in three hours/ all day long.
8. He's been waiting since over two hours/8 o'clock this morning.