In the environment area, there is a system ________ the waste is disposed of by using the principles of ecology.
With real estate (房地产)______ in economy, a lot of rich farmland had to ______ new houses and offices in the area.
He suffers two heart attacks in a year. It hasn’t stopped him drinking wine, ______.
______ the worker’s working efficiency, the manager will allow him to have a coffee break.
John’s success has nothing to do with good luck. It’s years of hard work ______has made him what he is today.
The country life he was used to ______ greatly since 1998.