问题
选择题
The fireman started to put out the big fire_____ arriving at the burning building.
A.by
B.on
C.at
D.in
答案
答案:B
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
The fireman started to put out the big fire_____ arriving at the burning building.
A.by
B.on
C.at
D.in
答案:B
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