题目

If we can ____ this speed,we should arrive there in about two days.
A.keep up B.keep to C.keep on
这三个词都有保持的意思吧,那都分别用在什么情况下呢?
我现在只对它们有个模糊的概念,

提问时间：2021-01-22

答案

Akeep up:保持,继续,维持例句与用法:1.The enemy kept up their bombardment day and night.敌军一直日夜不停地狂轰滥炸.2.The high cost of raw materials is keeping prices up.原料费用昂贵使得产品价格居高不下....