The reason over time lies in the fact that when cultures meet and communicate wi

The reason ________(英语变化了)over time lies in the fact that when cultures meet and communicate with each other all languages change and develop．(changed)

试题答案

答案：

答案：why English has changed

解析：考查定语从句和时态。Reason引导定语从句而且从句缺状语，故用why；由句意可知本句是现在完成时。