一.单项选择(15分) 1.Not only his father but also his mother _____ a teacher. A are B is C am D were 2. My father has worked in this factory fifteen years. A、for B、since C、before D、in 3.I’ve heard ____ the singer before. A about B on C at D of 4.The beautiful music is ______ Strauss. A by B made C playing D of 5.The earth goes ______ the sun. A to B round C around D over 6. In the traffic accident,