--            is he?--He is PSY. He sang the song Gangnam Style (《江南Style》).

---Is ________ mother a teacher?  ---Yes, and Lucy and Lily are           .

— What a nice MP5! Whose is it? — It’s           . My father bought me last week.

— What do you think of math? — I find               difficult to learn it.

Daniel is good at computer. He taught _____ to make a home page.