SPORTS ON THE AIR: Thursday, April 18
TELEVISION AUTO RACING: 11:25 p.m. — Formula 1 practice at Shanghai (ESPNU); 3:25 a.m. — Formula 1 sprint qualifying at Shanghai (ESPN2). BRITISH BASKETBALL LEAGUE: 2:30 p.m. — Surrey Scorchers at London Lions (Bally Sports Indiana). COLLEGE BASEBALL: 7 p. …