Ответ:

4 My father bought the new after he had tried it a few times.

5 By the time Sonia got to the party , everyone had begun dancing.

6 Lorenzo had eaten all the ice cream before I opened the fridge.

7 There was a lot of snow outside because it had snowed earlier in that day.

8 Beatriz didn't pass the test because she hadn't study at all.

9 Look! Somebody has left the window open.

10 By the time the police arrived, the burglar had broken into my neighbors house.

11 The girl left guilty because she had drunk all the milk.

12 Our flat was robbed because we hadn't locked the front door.

13 My father couldn't find the money because he had hidden it in a drawer.

14 Leonard didn't have money for the bus because he had forgotten to ask his mother.

15 My cousin had never visited a mine until his father took him one.

16 Her bicycle wasn't there because a friend had taken it without asking her.

17 Daniel was arrested after he had escaped from prison.

18 When Kathy met Jonathan he had joined the Navy.

19 Before they arrived at the airport, they had paid the taxi.

20 His dog died two weeks ago. He was very sad.