Find mistakes and correct them.

1) Greg and Bob had looked for their dog for two hours

before they found it sleeping under a bench in the park.

2) We had been boating in the lake at 10 o'clock

yesterday morning.

3) She finished cooking dinner by the time her children

returned from school.

4) When Henry opened the door of the living room, his

little brother watched cartoons on TV.

5) Sally took a piece of paper and had written her

phone number on it.

6) We were driving for six hours before we saw a small

hotel beside the road.

7) After my friends left I washed the dishes and

switched on the TV set.

8) What had you been doing at the moment the fire

broke out?

9) How much was your camera costing a year ago?

10) What were Nelly doing while you were doing the

ironing?

1) Greg and Bob had been looking for their dog for two hours

before they found it sleeping under a bench in the park.

2) We boated или were boating in the lake at 10 o'clock

yesterday morning.

3) She had finished cooking dinner by the time her children

returned from school.

4) When Henry opened the door of the living room, his

little brother was watching cartoons on TV.

5) Sally took a piece of paper and wrote her

phone number on it.

6) W e had been driving for six hours before we saw a small

hotel beside the road.

7) After my friends left I washed the dishes and

switched on the TV set. тут все ок, Past simple - последовательность действий, если только вместо left можно поставить had left

8) What were you doing at the moment the fire

broke out?

9) How much did your camera cost a year ago?

10) What were Nelly doing while you were doing the

ironing? все правильно, Past Continuous - Два или более длительных действий в прошлом, происходивших одновременно