The chemistry teacher required the students___more attention

The chemistry teacher required the students___more attention The chemistry teacher asked the students what water was ___ 1.The students are watching their chemistry teacher ____ the Because Ms.Metser,the new chemistry teacher,presented the su Our chemistry teacher announced that he would do the experim 把" Where does your chemistry teacher live ,karen "the young 1.The teacher required that all the assignments _____finishe 英语试题1.The teacher required that all the assignments _____fin the teacher required that everybody( )notes in the class The teacher required that all errors should be ()before the you will have to pay more attention--the teacher Attention please Please keep___while the teacher is giving a