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Man, like other animals, _____ ever a host to a great number of parasites: foreign organisms which cling to the skin or live inside the body. Most of these parasites cause us little discomfort, but a few are responsible for serious parasitic diseases particularly in tropical countries. Malaria and sleeping sickness, for instance -- and these are caused by small protozoan parasites consisting of a single cell -- are still major causes of death in many parts of the world. Other parasitic diseases like schistosomiasis, which are due to much larger worm-like parasites, ____ relatively few deaths, but they seriously affect the well-being of more than two hundred million people.
a) Is - cause - are
b) Are - causes - were
c) Is - causes - was
d) Are - cause - was
e) Is - cause - were
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Discussões sobre Licenciatura em História

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Ed Verified user icon

mês passado

Vamos analisar as opções uma a uma, considerando a concordância verbal e o contexto da frase. A frase começa com "Man, like other animals, _____ ever a host to a great number of parasites". Aqui, o sujeito "Man" (homem) é singular, então o verbo deve estar na forma singular. A palavra "ever" sugere que estamos falando de uma situação geral, então "is" (é) é a escolha correta. A segunda parte da frase diz "but a few are responsible for serious parasitic diseases". Aqui, "a few" é plural, então o verbo deve ser "cause" (causam), que também está na forma plural. Por fim, a frase termina com "but they seriously affect the well-being of more than two hundred million people". O tempo verbal aqui deve ser no presente, já que estamos falando de uma situação atual. Analisando as opções: a) Is - cause - are (correta) b) Are - causes - were (incorreta) c) Is - causes - was (incorreta) d) Are - cause - was (incorreta) e) Is - cause - were (incorreta) Portanto, a alternativa correta é: a) Is - cause - are.

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