There one country in the world.

_ _ you _ _ the film Harry Potter 5? – Not yet. I’ll see it this evening.

Must I buy lunch at school?—No, you needn’t. You __________ bring your own lunch if you want to.

_______ of the students in our class _______ interested in micro blogs (微博) on the Internet.

.The higher the oil price is, ___________to the global economy.