填空题 If you know the... of something, you know all the details about it and understand how it works.

单选题 In the kitchen, going green can save you money and keep you ___.【仅支持A-H选项，选项超出支持范围】

单选题 Buying produce and other raw foods cuts down on ___ that ends up in landfills.【仅支持A-H选项，选项超出支持范围】

单选题 Vinegar cuts grease on stove tops and oven doors, and can even whiten your ___ and remove stains from clothes.【仅支持A-H选项，选项超出支持范围】

单选题 You can even use some of the items you ___in the trash to up cycle.【仅支持A-H选项，选项超出支持范围】

单选题 You can also look for products that use ___or bio-degradable packaging.【仅支持A-H选项，选项超出支持范围】

单选题 Even if you’re not a hard-core Greenie, there are small acts you can take every day to save both the earth and your ___.【仅支持A-H选项，选项超出支持范围】

单选题 It’s easy to ignore, but a great amount of energy gets wasted around the house. You can ___large appliances and other devices that aren’t being used.【仅支持A-H选项，选项超出支持范围】

单选题 Going DIY with cleaning products is a good way to start. You can use ___at home that won’t cost you any extra money — and that work just as well as the store-bought stuff.【仅支持A-H选项，选项超出支持范围】