Chia động từ trong ngoặc ở đúng dạng bị động
1. Tree(cut)down
2. They (take) to the paper mill
3. The bark(remove)
4. The wood(break) into small chips
5.The chips(mix) wiht water
6.The mixture(make)into pulp
7. Chemicals(add) to the mixture
8. The pulp(press) by rollers to remove the water
9. The paper(dry) by not rollers
10. The tolls of paper(send) to factories new paper offices
1. Bạn xem lại đề nha, "tree" hay "trees" ?
2. are taken
3. is removed
4. is broken
5. are mixed
6. is made
7. are added
8. is pressed
9. is drown
10. are sent