they were the Boy Scouts whose task was to help elderly .
whose 做定语从句
task it was it 做形式宾语
原句 it was Boy Scouts's task to help elderly people.
they were the Boy Scouts whose task was to help elderly .
whose 做定语从句
task it was it 做形式宾语
原句 it was Boy Scouts's task to help elderly people.