6.A: I phoned at 5, but there was no answer.
B: Naturally. (I \ do shopping at the time)
7.A: Why did you tell your brother a lie?
B:(I \ not; I\ joke)
8/A: Did you win the race?
B:(we \ not run; a thunderstorm\begin)
9.A: Why did you write your test so badly?
B:(I\whisper the answer to John)
10.A: So,what did your mother say about your plan?
B: (Iot tell her; she \be busy; she\talk on the phone)

Спасибо Вам большое! Я Вам очень благодарна!

Не за что!)

Тут везде только ing добавлять надо?

Нет. Где то Past Simple, а где то Past Continuous. В некоторых местах связка because нужна, но не везде

Ага,ясненько))) Благодарю)

6. Naturally. I was doing shopping at the time7. I didn't tell a lie, because I was joking.8. We didn't run the race, because a thunderstorm began9. Because I whispered the answer to John10. I didn't tell her about my plan, because she was busy. She was talking on the phone.