1.are used by a lot of people
2.have not been taugh by Miss Diep science the last semester.
3.are taught by Mr.Vinh
4.is being done by the student
5.will be given a free period this Saturday to prepare the festival by our teachers.
6.this dictionary bought two weeks ago?
7.should be cleaned twice a day.
8.I don't be impressed with Alan's knowledge about science and technology.
9.are drove to school by her father everyday.
10.will be built here next year.