Complete the sentences. Use the correct form of the present perfect simple or the present perfect continuous.​

1) In 1962,Nelson Mandela, the leader of the African National Congress (ANC),was 2)sent to prison for life.
3) The ANC fought (fight) agains the idea of apartheid,a system in South Africa which (did not give) black people the same rights as white people.
4) While Mandela (was) in prison, he ... (became) very famous all over the world.
5) The South African Government . (allowed) Mandela to leave prison in 1990 - he (had been) a prisoner for more than 27 years.
6) After leaving prison, he (continued) to work for the black people in his country.
7) Mandela and the President, de Klerk, ... (won) the Nobel Peace Prize in 1993 because they ...(had worked) very hard for peace.
8) In 1994, Mandela ...(became) President of South Africa. There ... (had not been) a black president before him.

Nina Junaluska can speak two languages – English and her native Cherokee which (1) … (is dying) out. She (.2) … (performed) two songs in her native Cherokee at the Native Youth Languages Fair last year. Some 185 American Indian students, ranging up into adulthood, also (.3) … (celebrated) their native tongues by making presentations in 13 languages, from Cherokee and Comanche to Oneida, Navajo and Apache. Nina (.4) … (did not have) any trouble: she (5) … (has been teaching) Cherokee since early childhood, says her mother, who taught Cherokee in schools and is now a Tribal Council member. “She (6) … (was learning) the songs as she grew up,” Nina’s mother said. “It was passed down by our grandmother to my mother and then to us, and we (7) … (are passing) it on to my grand son now.”