There is a system ________the waste is disposed of using the principles of ecology.

When I arrived, Bryan took me to see the house___ I would be staying.

Nowadays people are more concerned about the environment ___ they live.

Microblog is a platform ________ people can express their thoughts and communicate with each other by sending posts.

I’ll never trust such a man ______ you described.    

She doesn’t like the way ___ you speak to her.

Without facts, a person can not form a correct opinion, for he needs to have actual knowledge ______his thinking .

The general at last got a chance to visit the village, ____ he used to fight, _____ he had been dreaming of for years.

Sales director is a position ______communication ability is just as important as sales skills.

Professor Lee arrived in Paris in 2009, ______, some time later, he was employed by a famous computer company.