chuyển thành câu bị động 1 / Nothing can change my mind 2/ where do people speak English ? 3/ after class , one of the students always erases the chalk board 4/ do they teach english here ? 5/ how many games has the team played ? 6 how can they open this safe ? 7/ who look after the children for you ? 8 / how long have they waited for the doctor ? 9/ who lend you this book ? 10/ how many marks does the teacher give you ? giải giúp mình với mn ơi cảm ơn nhìu