“到他十岁的时候就已经学完了高等数学”用英语怎么说填空_____ _____ _____ he was ten,he _____英语解答

“到他十岁的时候就已经学完了高等数学”用英语怎么说填空
_____ _____ _____ he was ten,he _____ _____ advanced math.

人气：439 ℃　时间：2020-01-06 16:37:16

解答

应该是 By the time ;had finished
by the time引导的句子,主句要用过去完成时