Bao Trinh, a junior at Eleanor Roosevelt High School in Greenbelt, is a third place winner in the French National Test, sponsored by the American Association of Teachers of French. The test is given annually to more than 50,000 students. Trinh competed in French IV. Tanya Pallia, also from Roosevelt, received an honorable mention for her score in French II. Poster Contest Winners

Seven students in the county have been recognized for their artistic achievements in the Prince George's County Public Schools' Alcohol Awareness Poster Contest. Grand Prize winner in the senior high division is Emily Parker of Friendly High. Mark Allen of Eleanor Roosevelt High won first place, Steve Platter of Roosevelt came in second and Arthur Ho of Friendly High placed third.

Winners in the middle school division are: Gezo Edwards of Dwight D. Eisenhower, first place; Kathy Brockett of Martin Luther King, Jr., second; and Molly Smith of Oxon Hill, third. Student & Teacher Historians Named

The United States Capitol Historical Society has named John Radko, a senior at High Point High School, student historian of Prince George's County, and Russell Maxwell, teacher coordinator for social studies at Fairmont Heights High School, as teacher historian of the county. Radko was chosen on the basis of his essay, "The Individual in History: Theodore Roosevelt and Harriet Tubman." Maxwell was honored for his work on a project, "Following the Army of the Potomac," in which students spent several days touring and studying Civil War battlefields.

Radko's teacher, Gordon Russell, was also honored for his work in teaching history with a citation. This is the tenth year he has been so honored. New Foreign Service Officer

Renee N. Brooks has been sworn in as an officer in the United States Foreign Service. Her first assignment is in Mexico City. Brooks, the daughter of Vincent and Geneva Brooks of Hyattsville, graduated from Bethesda-Chevy Chase High School and the University of Virginia.