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(单选题)31: I wonder how many years ago____________.
A: did your father retire
B: your father retired
C: has your father retired
D: your father has retired
(责任编辑：admin) |
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(单选题)31: I wonder how many years ago____________.
A: did your father retire
B: your father retired
C: has your father retired
D: your father has retired
(责任编辑：admin) |