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        1. The world _________. Things never stay the same.
          A.changedB.is changingC.was changingD.will change
          B
          本題考查現(xiàn)在進(jìn)行時的基本用法。本題的含義為世界一直在改變,事物從來不保持一樣。根據(jù)句意可知本題使用現(xiàn)在進(jìn)行時,結(jié)構(gòu)為be+動詞的現(xiàn)在分詞,本題主語為單數(shù)第三人稱,故用is,故本題空格處填is changing,故本題選B。
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