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[ ]The happy student was singing _____ he was walking.A. until B. as C. since D. and

[ ]The happy student was singing _____ he was walking.
A、 until
B、 as
C、 since
D、 and

发布时间:2025-07-27 14:36:44
推荐参考答案 ( 由 题搜搜 官方老师解答 )
答案:B
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