Choose the correct answer.
1 of 5 She _____ studying for 6 hours when she went to bed.2 of 5 _____ you _____ long in that flat when you bought your house?3 of 5 How long _____ you _____ when the plane took off?4 of 5 They _____ dating long when they decided to get married.5 of 5 We were so tired when we arrived at the hotel. We _____ all day!