By the time Jack returned home from America, his son from college.
A. graduate
B. has graduated
C. had graduated
D. had been graduated
By the time Jack returned home from America, his son from college.A. graduateB. has gradu
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解决时间 2021-04-03 13:56
- 提问者网友：欺烟
- 2021-04-03 11:00
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- 五星知识达人网友：醉吻情书
- 2021-04-03 12:04
A. graduateB. has graduated(答案→)C. had graduatedD. had been graduated解析：考查时态。By与完成时连用，本题by后面是表示过去的时间，所以使用过去完成时。句意：到JACK回到美国的时候，他儿子已经大学毕业了。
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- 1楼网友：荒野風
- 2021-04-03 12:30
正好我需要
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