On the Christmas day, I gave my sister a hat and she offered me a watch ______.

1. A.
   in turn
2. B.
   in return
3. C.
   by turn
4. D.
   by return

On the Christmas day, I gave my sister a hat and she offered me a watch ______.

A. in turn                     B. in return            C. by turn              D. by return

On the Christmas day, I gave my sister a hat and she offered me a watch _________.

A. in turn　　　　　　 B. in return　　　　 C. by turns　　　 D. by return