讀一讀，猜一猜。
      They are twin brothers (孿生兄弟). One is on the right and one is on the left. But they have never
seen each other (從未見過對方).
What are they? They are ______________.

參考答案：
ears
答案不唯一

讀一讀，猜一猜。
      They are twin brothers (孿生兄弟). One is on the right and one is on the left. But they have never
seen each other (從未見過對方).
What are they? They are ______________.

參考答案：
ears
答案不唯一