Change these sentences to the passive voice 1.Careless driving causes many accidents. 2.Weeds cover the river bank. 3.They make a lot of beautiful toys from recycled plastic. 4.The workers clean the streets every day. 5.They build this house more than one hundred years ago. 6.Every year Viet Nam exports millions of tons of rice. 7.Vietnamese people celebrate their Lunar New Year around January or February 8.Some body usually cleans the room 9.You have opened this box before Christmas Day. 10.They made tea with cold water last night 11.The students have held a meeting before the Teacher's Day. 12.We use cloth bags instead of plastic bags.