Question

Although he is only a __________ boy, he knows a lot.

A．five-year old

B．five-year-old

C．five years old

D．five-years-old

Answer 1

B

試題分析：句意：。雖然他只是一個五歲的男孩，但他知道很多。所填詞在句中作定語，修飾名詞boy，該用形容詞，five-year-old是形容詞，其中的名詞year用單數形式；five years old通常不用于修飾名詞，所以選B。