_____ to your birthday party lastSunday!– Unfortunately,you were on business

—Do you have any plans for the weekend? —Yes. I _______ for Shenzhen tomorrow. [ ]

China is developing _________ of all the countries inthe world.

My elder brother wants to buy a _ computer, so that he can carry it around when he travels.

This is an illness that may result in total blindness if _____ [ ]