i can never forget the day ______ we worked together

i can never forget the day ______ we worked together I can never forget the day… we worked together and the day…w I can never forget the day ____ we worked together and the d I can never forget the day in which we worked together,此句正确吗 1.I can never forget the day(when) we worked together and th I will never forget the day _____  we worked together i I can never forget the days __we worked together and the day I can never forget the day ____we worked together and the da i will never forget the day（ ） we worked together in London. I will never forget the day ___ we worked together in London I’ll never forget the days___in which__ we worked together. 1.I’ll never forget the days we worked together.