Question

– Why did they help Mrs Brown with her work?
– Because she was _____.

A．an old friend of them	B．the friend of them
C．on the their friend	D．a good friend of theirs

Answer 1

D

試題分析：句意：他為什么幫助布朗夫人做她的工作？——因為她是他們的一個好朋友。Of在表示所有關系時，后面接名詞，them是人稱代詞。選項ABC結構有誤，故選D，名詞性物主代詞做介詞賓語。
點評：of的基本含義是……的，關于。在表示所有關系時，后面接名詞，謂語被修飾詞后面，做定語。