Recent Content by maitrangnghihoa5@gmail.com

1.You must not use this machine after 5.30 p.m => This machine mustn't be used after 5.30 pm. 2.One of the students always erases chalk board => Chalk board is always erased by one of the students. 3.Somebody has taken some of my books away => Some of my books have been taken away. 4.They...