9.[本题1分] In the first class in this semester,the teacher sta

16.In the first class in this semester,the teacher started _ he keep the class in stitches the whole semester I think the teacher must( )carefully in class first. 1,The teacher ____the students ____the passage in the class. when( )your first class ( )in the moring The first class in morning at twenty The teacher told us ( ) story in class. The teacher asks Ben__adifficult question in class. in carefullly listen the to teacher class The teacher told us to_____talk in class. listen to the teacher in class The teacher should ___carefully in class