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题目内容
（河北建筑工程学院-建筑学-大学英语1）
--Mike, you’ve got so many beautiful stamps. --Yeah. I _________ collect stamps when I was in primary school（单选）—4分
A was used to
B used to
C am used to
D used
A was used to
B used to
C am used to
D used
参考答案
