问题
选择题
| His father told me that he _____ for the United States three days _____. |
A. has left; ago B. had left; ago C. left; ago D. had left; before |
答案
答案：D
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| His father told me that he _____ for the United States three days _____. |
A. has left; ago B. had left; ago C. left; ago D. had left; before |
答案：D