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    Question

    Scientists have (1)______ a gel that helps brains

    recover from traumatic injuries. It has the potential to (2)______ head injuries sustained in combat, car accidents, falls, or gunshot wounds. (3)_______ by Dr. Ning Zhang at Clemson University in South Carolina, the gel is (4)_______ in liquid form at the site of injury and stimulates the growth of stem cells there. In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.
    A 1. manufactured, 2. heal, 3. Initiated, 4. implanted Correct Answer Incorrect Answer
    B 1. developed, 2. treat, 3. Developed, 4. injected Correct Answer Incorrect Answer
    C 1. produced, 2. medicate, 3. Established, 4. interjected Correct Answer Incorrect Answer
    D 1. constructed, 2. assist, 3. Devised, 4. inserted Correct Answer Incorrect Answer

    Solution

    The correct answer is B

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