问题补充:
– Why did they help Mrs Brown with her work?
– Because she was .
A. an old friend of them
B. the friend of them
C. a the their friend
D. a good friend of theirs
答案:
A. an old friend of them
B. the friend of them
C. a the their friend
(答案→)D. a good friend of theirs
解析:句意:为什么他们帮助布朗夫人做她的工作?因为她是他们的一位朋友。a good friend of theirs=one of their good friends他们的一位好朋友,所以选D。