1-5 Mr Weller was wrapping a present for Melanie, when Melanie came back and saw it.
2-1 Mr Weller was raising the flag when the weather changed.
3-2 While Mrs Weller was cooking the turkey, she found an earring.
4-4 While Stuart was eating Christmas pudding, he found the coin.
5-6 While Daniel and Melanie were going to their grandparents', they met Santa Claus.
6-3 The Wellers were watching the parade on TV, when they saw thier friends.
Я думаю так1-a устойчивое выражение без the
2-a Past Simple тк действие в прошлом
3-a тк yet употребляется только с Present Perfect
4-c действие до действия past perfect
5-b be good at устойчивое выражение
6-c дейсдтвие до действия Past Perfect
7-a действие в прошлом Past Simple 8-b past simple тк years ago уточнение времени
9-b present perfect тк нет указание на время
10-c present perfec progressive
тк for
<span>1. While \ Paula was driving her daughter was looking out of window
2. They were having a meeting \ when \ his mobile \ rang
3. As \ she was driving home the car \ broke down
4. Elisabeth was ironing while \ Alex was surfing the Net
6. The boys were playing garden \ when \suddenly it started raining.</span>