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September10thisthedayteachersandstudentsalloverthecountrycelebrateeveryyear.A.whenB.onwhichC.thatD.forwhich到底哪个,这么多答案....

题目详情
September 10th is the day _teachers and students all over the country celebrate every year.
A.when B.on which C.that D.for which
到底哪个,这么多答案....
▼优质解答
答案和解析
that
先行词在从句中作celebrate的宾语