His father told me that he ____  for the United States three days _______.
#101828
A
has left; ago
B
had left; ago
C
left; ago
D
had left; before
推荐题目
By the time Jack returned home from England, his son __________from college. 
#101958
A
graduated
B
has graduated
C
had been graduating
D
had graduated
The teacher said that Columbus _______America in 1492.
#102954
A
discovered
B
found
C
had discovered
D
had found