`~rai~`
`text{1.Many trees were planted in the school garden.}`
`text{2.My book has been taken away.}`
`text{3.I wasn't helped with my homework.}`
`text{4.English has been learnt for three years.}`
`text{5.Books are often read by my father before bed time.}`
`text{6.Some comic books were bought Lan's brother.}`
`text{7.A sister was received by my sister yesterday.}`
`text{8.The problem can be solved in just two minutes.}`
`text{9.Electricity is used for lighting nowadays.}`