... Fifteen-minute test Grade: 12 basic Full name: ......................................... Class: 12.... Fill each blank with but, so, however or therefore where appropriate. 1. This is the shortest way ... Fifteen-minute test Grade: 12 basic Full name: ......................................... Class: 12.... Underline ... conclusion. 10. It started to rain hard; ______ we decided to stay at home to watch TV. Fifteen-minute test Grade: 12 basic Full name: ......................................... Class: 12.... Fill in...