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