Can you imagine _______________ on the earth in the future

You ______ television.Why not do something more active?

Have you seen your friend off ?—YesI watched the train leaving the station it disappeared from sight

People amonument to honour those people who devoted their lives to their country

This is _____ third year that China has taken part in the activity Earth Hour. But we hope we can try our best to make the earth ____better world.