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    33、The first use of atomic weapons was in 1945. and their power ______ increased enormously eversince.

    A. is        B. was      C. has been      D. had been

    33、C

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    The first use of atomic weapons was in 1945. and their power ______ increased enormously eversince.

    A. is        B. was      C. has been      D. had been

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