单选题Each child to the classroom was given a gift on Children’s Day, it was specially prepared for the occasion.
A.of which
B.that
C.as
D.which
参考答案：D
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答案解析：这句话的意思是：儿童节那天，每个到教室的孩子都会收到一份礼物，这是为节日特别准备的。此处考查which引导的非限定性定语从句，修饰先行词gift,因此只能用which，不能用that。故选择D。
