When walking down the street, I came across David, when I _____ for years.
| A． |
didn't see |
B． |
haven't seen |
C． |
hadn't seen |
D． |
wouldn't see |
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When walking down the street, I came across David, when I _____ for years.
| A． |
didn't see |
B． |
haven't seen |
C． |
hadn't seen |
D． |
wouldn't see |
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