By the time Jack returned home from England,his son___ from college.A.graduated B.has graduated C.had been graduating D.had graduated

jack is learning how to tell the time by this clock对this clock 提问 jack is learning how to tell the time by this clock怎么翻译 by the time ,by then the article by JACK是指作者是JACK吗? By the time by the time 用by the time造句! by the time怎么造句? by the time +现在式造句 by the time 的用法 by the time 等于什么? by the time to 谢 by the time什么意思 By the time Jack returned home from England,his son___ from college.A.graduated B.has graduated C.had been graduating D.had graduated 1.Jack has gone to school.（用by the time改写）Jack _______ ________ to school by the time I called him.2.The story was very interesting.I could never forget it.The story was ________ _________ ________ I could never forget it.3.I was late for s Jack has a great time in the park.(改为同义句)Jack _____ ______in the park. How did you find the lecture by Jack Smith? in time ,on time ,by the time 的区别,