题目内容

The world _____ . Things never stay the same.
A．changesB．is changingC．was changingD．will change
B

试题分析：句意：世界正在发生变化。事情不会永远保持不变。结合语境可知本句描述的是现在正在进行的动作，故用现在进行时态。选B。
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