Ответ:

1)I lost my phone on the street.

2)Have you washed your hands?

3)He bought a car.

4)I learned Italian.

5)He booked a single room.

Ответ:

В этих предложениях должен Present Perfect использоваться, а не Past. Если в задании верно указано время, то будет так:

1) I had lost my phone on the street.

2) Had you washed your hands?

3) He had bought a car.

4) I had learned Italian.

5) He had booked a single room.

На всякий случай в Present распишу:
1) I have lost my phone on the street.

2) Have you washed your hands?

3) He has bought a car.

4) I have learned Italian.

5) He has booked a single room.

Объяснение: