It’s hard to imagine_____it would be like living on Mars.

_______ we have planned ahead might change when we put it into practice. 

 —What should we pay more attention to if we go north in winter, Mum?—Nothing much. Take warm clothes________ the weather is cold.

While traveling in Sichuan，you can’t miss________people call “The National Treasure”—Giant Panda.  

The seriously ill man thinks it doesn’t matter　　　he will die, but what matters much is how he lives.