Употребите предложения в вопросительной и отрицательной форме
1.physics is a study of non-living things
2.the science deals with changes in composition
3.these dictionaaries are very useful
4.he can spell all these words
5.this was the teacher's last question
6.she knows the answer to this question
7.the lesson is over
8.the teacher speaks english to the students
9.tom answered the teacher's question correctly
10.alice spoke loubly