You must face the reality and know the environment _________.
—They are quiet, aren’t they? —Yes. They are accustomed ______ at meals.
Thank you for all your hard work last week. I don’t think we ______ it without you.
For many cities in the world, there is no room to spread our further, ____ New York is an example.
____ well prepared you are , you still need a lot of luck in mountain climbing.
In many places in China, bicycle is still poplar means of transportation.