Put the verbs in brackets into the Present Perfect Active or Passive.

1) We (not to meet) this person before.
2) The letters (to type) already.
3) The fans (already/to inform) about the delay of the concert.
4) This singer (just/to release) his new album.
5) The leader of the folk group (already/to interview).
6) We (just/to read) the review of the performance.

Исследования начались с экспедиции на русских судах "Нева" и "Надежда" в одна тысяча восемьсот третьем году. В начале двадцатого века совершалось много экспедиций, результатом которых было открытие максимальной глубины Яванской и Бугенвильской впадин. В экспедициях участвовали многие страны (Россия, Канада, Исландия, Франция и др.). Собранные к концу века данные о природных процессах в океане позволили увеличить промысел рыбы, осваивать его минеральные ресурсы.

Источник: https://travelask.ru/questions/80242-kakie-vazhnye-otkrytiya-byli-sdelany-v-20-veke-pri-issledova

 hi - whether didn't see It was pleasant to you a trip to America Yes, very much hi-long ago it was pleasant And why youwent to America? I wanted to visit this country long ago, it was my dream That most of all was pleasant to you? It was pleasant to me goodwill of people, and their communication with the people who arrived from other countries and also, I liked clean air What sights you visited? I was in the Disneyland, visited the White house, and saw the Statue of Liberty And what such the Disneyland? It is entertaining park, children with the families go there to have a good time. You would like to remain there? yes I would like, but my homeland Kazakhstan, here all my native, here my friends, is expensive to me our nature and I would like to work for the benefit of the homeland. Having learned from you about America, I wanted to go there. Yes, I advise you. Thanks, very so far