(Cesgranrio 90) Mark the sentence which can be completed with the verb between parentheses in the same verb tense as in Scientists HAVE FOUND that the laser beam can transmit human voices: a) A century ago, scientists not able to predict the applications of the laser beam. (BE) b) Doctors started to use the laser beam only after communication experts it. (USE) c) Today laser researchers the laser beam is here to stay. (BELIEVE) d) Scientists the importance of the laser since it was discovered. (REALIZE) e) By the year 2000, scientists in various areas the use of the laser beam. (EXTEND)
Com explicação pfvr
Com explicação pfvr
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A explicação é a seguinte:
- Na frase original, "Scientists HAVE FOUND" está no Present Perfect tense, que indica uma ação concluída no passado, mas que tem relevância no presente.
- Para manter o mesmo tempo verbal, precisamos escolher uma opção em que o verbo esteja conjugado no Present Perfect.
- A opção d) "Scientists (have) realized the importance of the laser since it was discovered" é a única que utiliza o verbo "realize" no Present Perfect, tornando-se "Scientists HAVE REALIZED the importance of the laser since it was discovered".
Assim, essa é a frase que pode ser completada com o verbo entre parênteses no mesmo tempo verbal.