Inglês 11.º Ano: Inserção de Sentenças em Texto (Exame 2019, 2.ª Fase)

8.
Read the following paragraph about Biosphere 2.
Three sentences have been removed from it.
From the sentences 1) to 5), choose the one which fits each gap a) to c).
Two of the sentences do not apply.
Write only the letters and the numbers.
The designers of Biosphere 2 included a carefully chosen variety of plant, animal, and insect species.
a)______ Of the 25 small vertebrates with which the project began, only 6 did not die out by the mission's end.
b)______ This caused its own problems, since the plants could no longer reproduce.
At the same time, some species absolutely thrived in this man-made environment.
c)______ Biosphere 2 could not sustain a balanced ecosystem, and therefore failed to fulfil its goals.
Options:
1) The crew members were forced to put vast amounts of energy into simply maintaining their food crops.
2) Those which had been included to pollinate plants did not survive either.
3) Pests ran wild, while certain vines threatened to choke out every other kind of plant.
4) They had anticipated that some species would not survive, but in fact the extinction rate was much higher.
5) What's more, Biosphere 2's soil, especially in the rainforest and savannah areas, is unusually rich in organic material.

Chave: a) – 4); b) – 2); с) – 3).