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---When did the young man save you?

       ---January 1st,2000, the first day of the new century,_______ I can never forget.

       A. when                B. which                      C. that                          D. where

---When did the young man save you?

---January 1^st,2000, the first day of the new century,_______ I can never forget.

　　　 A. when　　　　　　　 B. which　　　　　　　　　　 C. that　　　　　 　　　　　　 D. where

---When did the young man save you?
---January 1st,2000, the first day of the new century,_______ I can never forget.

 ---When did the young man save you?

   ---January 1^st,2000, the first day of the new century,_______ I can never forget.

   A. when          B. which                C. that             D. where