Вопрос, который вызвал трудности

Задайте общие вопросы и дайте краткий ответ.
1. —— in London last Christmas?——Yes,
(He was in London last Christmas.)
2. —— in the United States at the end of May?
——Yes,........
(They were in the United States at the end of May.)
3-.......Easter at the end of April?
-.....Yes,...........
4.---.....the Christmas tree on the first of December ?---.......Yes,..........
(They decorated the Christmas tree on the first of December).
5.--............. -----Yes,...... (The could swim.)
6.----.......twenty cards last Sunday ?---.........Yes,....
(She sent twenty cards last Sunday.)
7.---.........the books on the treble ?------Yes,......
(He put the books on the table.)
8.----...........the books on the table?
-----Yes,...............................
(He put the books on the table.)
9.-—..................Mother's Day?
--- Yes,......................
(They always celebrate Mother's Day.)
10____.........to send Christmas cards?
______yes,............
(She likes to send Christmas cards.)

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Чтобы дать полноценный ответ, был привлечён специалист, который хорошо разбирается в теме.

После обсуждения с другими специалистами сервиса мы пришли к выводу, что правильный ответ на ваш вопрос будет звучать следующим образом:

1was he in London last Christmas? Yes, he was
 2 were they in the United States at the end of May? Yes, they were
3 Was Easter at the end of April? Yes, it was
4 Did they decorate the Christmas tree on the first of December? Yes, they did
5 Could they swim? Yes, they could
6 Did she send twenty cards last Sunday? Yes, she did
7 Did he put the books on the table? Yes, he did
9 Do they always celebrate Mother's Day? Yes, they do
10 Does she like to send Christmas cards? Yes, she does