The fireman started to put out the big fire arriving at the burning building.A. byB. onC.

发布时间：2020-08-16 16:09:52

The fireman started to put out the big fire     arriving at the burning building.
A. by
B. on
C. at
D. in

网友回答

A. by
(答案→)B. on
C. at
D. in
解析：on 一…就… 句意为“消防员一到达着火的楼房那就开始灭火”选B
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