1. How long has Henry waited for the bus?
He's waited for the bus since 8 o'clock.
2. How long have you studied?
I've studied for five hours.
3. How long has Mrs. McGee worked here?
She's worked here for thirty-five years.
4. How long have you two argued?
We've argued since we got here.
5.How long have Cheryl and Mike gone out?
They've gone out for three months.
6. How long has your loof leaked?
It's leaked since last week.
7. How long have your parents lived in Florida?
They've Lived in Florida since they retired.
8. How long have I snored?
You've snored all night.
9. How long have you liked spagett? = spaghetti
I've liked spagetti since I ate spagetti first. = spaghetti for the first time.

Good job~