牛用预混料配比:请教一道英语题

来源:百度文库 编辑:查人人中国名人网 时间:2024/05/04 08:51:55
The Olympic Games _____ every four years.
A.is held B.are held C.will held D.will be held

A

A 表示固定性行为

A 因为是经常性的

A