Mum I helped an old man cross the busy road this afternoon. .A. That’s all right. B. Good

问题补充：

Mum, I helped an old man cross the busy road this afternoon. .

A. That’s all right. B. Good idea C. Well done

答案：

解析：句意：妈妈，我今天下午帮助一个老人过拥挤的马路了。A 没关系；B 好主意；C 做的好；结合语境故选C。