1、People sell their products ____advertisement in the newspaper.
A. by putting an B. to put an
C. by putting a D. putting an
2、I _______ him to stop smoking, but failed.
A. persuaded B. tried to persuade
C. try persuading D. tried persuading
3、Thanks is a common _____ used in English. You can never use it too much.
A. word B. words C. expression D. expressing
