________ 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 train ________ here at 6 o’clock.

This is trip to Beijing. I hope we’ll enjoy the trip.

Do you have enough students to clean the laboratory? –No, I think we need____________ students.

What do you ____________ your English teacher? — Wow, she’s very friendly.