The Schwartz (1993) study examined the relationship between exposure to PM10 and prevalence of chronic bronchitis.
The study looked at the link between exposure to PM10 and prevalence of chronic bronchitis.
The study looked at the link between cancer and eating cookies.
a woman looks at a dock from the street
Mr. Bork says he gave Apple's lawyer a hearing.
Two men are digging.
A man is waiting for a train.
If they make some good investments ,they will do alright.
The men are getting ready to put on a roof.