Mother________usstorieswhenwewereyoung.A、wasusedtotellB、isusedtotellingC、usedtotellD、usedtotelling
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题目内容：
Mother ________ us stories when we were young.
A、was used to tell
B、is used to telling
C、used to tell
D、used to telling
优质解答
C
used to do.过去常常.
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