① I’ll never forget the days we studied together. ② I’ll never forget the days we spent together. A. that B. 不填 C. when D. A and B 【查看更多】

 

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①I’ll never forget the days ________ we studied together．

②I’ll never forget the days ________ we spent together．

A．that

B．不填

C．when

D．A and B

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