The harder the workers work, _____.[ ]

Where did you get the book?—From the library. And I have _______it for two weeks.

________ 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．

The first thing ______ I am going to do this evening is to go to sleep.

____ it is to play football on such a cool afternoon.