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I can never forget the day _______ we worked together and the day ______ we spent together.

A. when; which       B. which; when       C. what; that          D. on which; when

I can never forget the day _______ we worked together and the day ______ we spent together.

A. when; which B. which; when C. what; that D. on which; when

I can never forget the day _______ we worked together and the day ______ we spent together.

A. when; which B. which; when C. what; that D. on which; when

I can never forget the day ____we worked together and the day _____we spent together.

I can never forget the day _______ we worked together and the day ______ we spent together.

A. when; which 　 B. which; when 　　 C. what; that 　　 D. on which; when