题文
By the time Jack returned home from England, his son __________ from college.
| A．graduated |
| B．has graduated |
| C．had been graduating |
| D．had graduated |
推荐试卷
By the time Jack returned home from England, his son __________ from college.
| A．graduated |
| B．has graduated |
| C．had been graduating |
| D．had graduated |
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