Question

    In the following question a sentence has been given in

    its active/passive form followed by 5 alternatives. choose the option which is the correct changed form of the given sentence.  A solution to the problem is being worked on by the engineers.
    A The engineers have worked on a solution to the problem. Correct Answer Incorrect Answer
    B The engineers were working on a solution to the problem. Correct Answer Incorrect Answer
    C The engineers are working on a solution to the problem. Correct Answer Incorrect Answer
    D The engineers had been working on a solution to the problem. Correct Answer Incorrect Answer
    E None of the above Correct Answer Incorrect Answer

    Solution

    Explanation: The sentence in the passive voice is in the present continuous tense ("is being worked on"). In the active voice, the subject ("the engineers") is performing the action in the present continuous tense ("are working"). The engineers had been working on a solution to the problem .

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