Throwing the litter h________ and there is a bad habit.
One t________ can’t make a forest, so we need teamwork.
Most Chinese think the color r________ is the symbol of good luck.
To live a low— carbon（低碳）life, we should t________off the lights when we leave the room.
As we all know, the sun________（升起） in the east.
March is the________（第三） month of the year.
