The world _________. Things never stay the same.
A．changedB．is changingC．was changingD．will change
B
本題考查現(xiàn)在進行時的基本用法。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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