There must be someone at the door. I heard a bell

There must be someone at the door. I heard a bell .
[ ]
A. ring
B. to ring
C. ringing
D. was ringing
理想白日梦 1年前 已收到1个回答 举报

zhouwei225 幼苗

共回答了19个问题采纳率:89.5% 举报

C

1年前

8
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