These plants are watered ________．
A.each other dayB.every other dayC.each of two daysD.every of two days在线课程B
本题考查“每隔一……”的英语表达法。汉语的“每隔一天”，英语中常用every two days, every second day或every other day来表达。“每隔两/三天”用every three/four days或every third/fourth day。“每隔几天……”则用every few days。其中的every不能用each替代。