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Which option completes the text below correctly?
There are cells in the retina of our eye that ______ directly with the brain's biological clock regulators located in the hypothalamus and this pathway is most affected by light. These neurons ______ to be most affected by light waves from the blue spectrum or blue light. This is the kind of light most prominent in electronic lights from computers and smartphones. This ______ a modern challenge that can adversely affect our natural sleep-wake cycle.
Additional factors that can hamper sleep ______ pain conditions, medications for other conditions, and the increased demands and connectedness of modern society.
(Adapted from http://theconversation.com)
There are cells in the retina of our eye that ______ directly with the brain's biological clock regulators located in the hypothalamus and this pathway is most affected by light. These neurons ______ to be most affected by light waves from the blue spectrum or blue light. This is the kind of light most prominent in electronic lights from computers and smartphones. This ______ a modern challenge that can adversely affect our natural sleep-wake cycle.
Additional factors that can hamper sleep ______ pain conditions, medications for other conditions, and the increased demands and connectedness of modern society.
(Adapted from http://theconversation.com)
Resolução comentada
communicate / have been found / has become / include.
'Cells' é plural e pede 'communicate'. 'These neurons have been found' usa o present perfect passivo no plural. 'This has become' concorda com o singular. 'Factors ... include' pede o plural.
Análise das alternativas
B) 'communicates', 'had been found' e 'includes' não concordam. C) 'communicates' e 'includes' estão no singular. D) O past perfect não se encaixa e 'includes' não concorda com 'factors'. E) 'communicates' não concorda com 'cells'.
Referência: Concordância verbal e present perfect em inglês.
Resolução comentada do VaiConcursos.