We can’t live air or water.[ ]

My brother and I will go to the library tomorrow.—_______. Shall we go together? [ ]

The old photos ___________them __________the old days when they were young.

Which club would you like to join, art club or basketball?— _______ is OK. I’m good at them.

________ theme of the Shanghai Expo is “Better city, better life”． It will send _____ message to people around the world to care about the places where they live．