用方框中所给单词的适当形式填空，使短文通顺正确、连贯（每个单词限用一次）。

This month’s goal for helping to save our planet!
Week1: This week,my family tried to save electricity.We never left the lights ____ when leaving the rooms.We switched off the TV when _____was watching it.Mum only used cold water in the washing machine.
Week2: We started recycling this week.We tried to write on _____ sides of our paper,not just on one side.We also divided our rubbish into _____bags for bottles,cans,paper and food.Plastic bags from the supermarket were ______so we can use them again as rubbish bags.
Week3: We stopped taking long baths and had short showers ______.We flushed the toilet with _____ water.When mum and dad made tea or coffee,they used less water in the kettle(水壶).My sister and I didn’t leave the tap running when we brushed our _____.
Week4: Mum used to _____ us to school,but now my sister and I have started riding bikes to school.This week dad and a few of his workmates started to go to work together in one car and share the cost.My fridends and I became volunteers at school.We are taking the ______step to help make our school more earth-friendly.