—Shall I sit at this end of the boat or the other end? —If you keep still, you can sit at _____ end.

We have various summer camps for your holidays.You can choose________based on your own interests.                                                   

----Do the boys in your class enjoy playing chess?---______ likes it, but many of them like football.

—Mum, have you seen my U-Disk?—_______ you bought last Sunday? I'm-afraid I haven't seen _______．

---Is there anything else I can do for you, Jack? --- No, thanks. I really appreciate ______ when you lent all your notes to me before the exam.