题目内容
8. By the time Jack returned home from England,his son from college.
A. graduated B. has graduated
C. had been graduating D. had graduated
8. D
8. D解析:句中return用了过去式,故空 格处也应用过去时的某种形式,再根据 动作发生的先后顺序可知,应用过去完 成时。句意:到杰克从英格兰返回到家 园时,他的儿子已大学毕业了。
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