The trees ()(use) to build some houses every year.

The trees ()(use) to build some houses every year. Workers build houses ( ) the wood from trees. 英语的主动变被动They build houses every year.变成被动后：Houses are built Bamboo is used to build houses in some places. They plant some trees in the park every year.（用next year改写句子 .Some new houses _________(build) by the villagers themselve The family plants t_________of trees every year. plant_____ trees on the mountain every year. 英语选择:Some families use the weekends[ ] their houses. the farmers plant trees on the farn every year ________ trees are cut down in the forests every year. The students plant two hundreds trees every year.改错