The phrase "a exchange" is not correct in written English.
The correct form is "an exchange" because "exchange" begins with a vowel sound.
Example: "I would like to propose an exchange of ideas during our meeting."
Alternatives: "a trade" or "a swap".
Dr. Lincoln, whose doctorate in Russian history was from the University of Chicago, spent several years in Russia as a exchange scholar.
It seems to be part of a exchange with Enoch [Powell?] while also suggesting Crick may have had ambitions beyond a mere Nobel Prize.
Mr. B. said that the Association has 171 members & 13 associate member that there had been no display of fishing tackle; merely a exchange of ideas having to do with ways & means of persu ing more boys, girls.
Lieutenant Adams, of La Mesa, Calif., who had been assigned as a exchange officer with the Royal Navy's 849 Squadron, was killed when two Royal Navy helicopters collided, the Pentagon said.
She has been making that journey ever since she arrived in the United States when she was 22. "I was accompanying my husband, Bipin, a scientist in nuclear medicine who was on a exchange program," she said.
We investigated clinical fenomenology of psychopathologic disturbance of patients, suffering affliction by a exchange obesity, the differentiated schemes of a psychotherapy are designed and influencing psychotherapeutic tactics on efficiency of complex therapy of this group patients is detected.
