22.Lawrence Craven, a doctor from the USA,is the author of several published reports, one of______ introduced the idea in 1953 ______aspirin could reduce the risk of heart attacks.
21st Century, ____weekly newspaper, provides us with____variety of fresh articles about campus studies and life.
His first book ______ next month is based on a true story of his family.
People who are ______ modern city life may think it is rather dull to live in the countryside.
Many Chinese college graduates leave their country to get further education in America with the ______of getting better jobs in the future.
It is not difficult to ______ Mr. Huang from among a crowd because he is above average height.