As a environmentalist, he hopes to devoted his life water and air pollution a peaceful life.
When I opened the door, I found my father sitting in his chair, completely __________ in the humorous stories he was reading.
Before __________him, Icalled him __________.
In the past 100 years many species, as a result of human destruction to nature,__________ and many more __________ now.
Johnson held a party,__________ he invited all hisfriends.
—Where did you get to know her? —It was on the farm __________ we worked.