I didn’t quite follow him because he explained the theory _____that is too abstract for me.
Purchasing houses that are environmentally responsible is a good investment for____ about their own health and well-being of the earth.
Energy efficiency is one of the top_____in Dockside Green, one of the eco-communities.
The idea of travelling abroad really appeals to a lot of Chinese people.That's why every year ______ more people applying for passports.
In most cases, college graduates don't mind what job they will do _______ it is one where they can earn money to support themselves.
Though they are sharing space in the apartment building, residents will have _____utility meters(公用事业电表).