In recent years, oil______ (substitute) for certain natural materials.has substi

游客2023-09-27 41

问题 In recent years, oil______ (substitute) for certain natural materials.

选项

答案 has substituted

解析动词时态。根据时间状语in recent years(通常用于完成时态)，此处需用现在完成时。

转载请注明原文地址:https://www.tihaiku.com/zcyy/3051584.html

相关试题推荐

随机试题

最新回复(0)