Question

    In the following sentences, there are two blanks. Find out the appropriate words for filling up the blanks:

    North Korean troops were working under _______________on

    the roads on its side of the border near the west and east coasts that are likely preparations to ______________the roads.
    A surveillance, build up Correct Answer Incorrect Answer
    B camouflage, blow up Correct Answer Incorrect Answer
    C construction, fortify Correct Answer Incorrect Answer
    D disguise, guard Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    "Camouflage" fits the context of troops working covertly on the roads, suggesting concealment. "Blow up" is the appropriate phrase for destroying roads, matching the likely military preparation mentioned in the sentence. The other options do not match the intended meaning. For instance, "surveillance" and "build" don't reflect destruction, and "construction" and "fortify" imply protection rather than demolition.

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