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Ответ:
Which-которые, we-мы, are употребляется как is, только во множественном числе, a- употребление не во множественном числе
Be-быть
1)b
2)b
3)a
4)c
5)b
6)c
7)a
8)a
9)c
10)b
4-е задание
1. Neither he nor his sister had not come for the evening.
2. And a friend of mine , and I have done everything possible to help him .
3. He never knew how to sing or dance.
4. I would like to spend a vacation in the Crimea and the Caucasus .
5. Do not worry , either Kohl or Peter know his address.
6. And my friend and I will help him .
2: I always play basketball on Sundays.
3: We never wake up late.
4: Do you always wash your hands after supper?
5: I usually don't sleep late.
6: He sometimes goes to the park in the afternoon.
Перевод: Сегодня люди покупают еду в разных контейнерах.