Это прошедшее совершенное время past perfect с указанием момента в past simple.
Past perfect образуется при помощи вспомогательного глагола had и третьей формы глагола.
Ответ с) нам не подходит автоматически.
Ну и форм а и b не бывает в принципе, используется третья форма глагола.
Ответ D.
31.)
1.are
2.is
3.are
4.are
5.is
6.is
7.are
8.are
9.is
32.)
1.is
2.is
3.are
4.is
5.are
6.are
7.are
1. What does your friend look like? (не уверена правильно или нет)
2. Is her sister funny and nice?
3. His helmet is not under the box.
4. Whose these are keys? (не уверена)
5. Their brother is slim and tall.
6. What your sister is like?
1. Don't worry about James. He won't get lost. He surely knows his way around.
2. Are you aware of the new measures the government has taken to protect the environment?
3. I don't understand what you're talking about. It just doesn't make sense.
4. Can I have a word with you, Mike?
5. My friends never let me down. I can always rely on them.
6. Why were you so late? Did you lose your way?
7. It took me a while to get used to waking up at 6 o'clock every morning.
8. The concert is sold out, so we didn't find any tickets.