Past Perfect Continuous 2

1 of 5 She _____ studying for 6 hours when she went to bed.

had

had been

has been

2 of 5 _____ you _____ long in that flat when you bought your house?

Had, been living

Has, been living

Had, been lived

3 of 5 How long _____ you _____ when the plane took off?

had, waited

have, been waiting

had, been waiting

4 of 5 They _____ dating long when they decided to get married.

haven't been

hadn't been

been

5 of 5 We were so tired when we arrived at the hotel. We _____ all day!

were walking

had been walking

have been walking