题干
Sally works very hard．Finally，she won the first place．(同义替换)
A：At the end of
B：At last
C：Luckily
D：To the end
答案(点此获取答案解析）
B
Sally works very hard．Finally，she won the first place．(同义替换)
A：At the end of
B：At last
C：Luckily
D：To the end
