Parents and teachers should help teenagers control their use of computer games ______be controlled by themselves.

Is this your key, Jenny ? —No, ______ is in my handbag.

. “Would you like to turn that music down？ I‘m writing a letter.” “_____.”

Do you have any books_____science?-I’m sorry, I don’t.[ ]

Your watch looks really nice.— I ______ it in a small shop last week.