Bài 10. Điền một từ thích hợp vào chỗ trống trong đoạn văn sau: We are ….(69)….the Earth. The seas and….(70) … are too dirty to swim in. There is too much smoke in the ..(71)…in many cities in the world. We are cutting …(72)…too many trees. We are burning the forests. We are also destroying lots of…(73)… and animals. Many areas …(74) ..earth are wasteland. ….(75)… in many parts of the world cannot grow enough to eat. In some countries there is too little rice. The Earth is in …(76).. Save the Earth.