Question

My friend Vivian is an       girl.

A．seventeen- year- old	B．seventeen years old
C．eighteen –year –old	D．eighteen years old

Answer 1

C

C 考查數詞加名詞作定語。a/ an+數詞-year-old +名詞，表示“一個……歲的人”。“一個18歲的女孩”an eighteen–year–old girl，eighteen首字母發音是元音，故用冠詞an。