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    Question

    Given the fact that most of us _________ over 90% of our

    time indoors, it is most important to _______ that the air we breathe in at home or in offices can be _______. It can be a ______ of illhealth.  Select the most appropriate option to fill in the blanks. 
    A waste; admit; corrupted; basis Correct Answer Incorrect Answer
    B invest; remember; murky; reason Correct Answer Incorrect Answer
    C consume; know; contaminated; reason Correct Answer Incorrect Answer
    D spend; recognise; polluted; cause Correct Answer Incorrect Answer

    Solution

    The correct answer is D

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