it's a comfort to ____you. A.be with B.with C.stay

（ ）It is safe ____you to stay at home.A.in B.for C.with D.of It's nice ____you ____me with my math.A.for; to help B.for; It 's not good at be late -----school.A,to B,for C,with D,of It 's not good at be late -----school.（ A,to B,for C,with D, it's a---(please) to stay with you How much does it ____you to fly to Beijing?A.cost B.take C.s It's always good to be with a friend. It's fun----with my mother.A go shop B go shopping C to go s it's right____us to help others A.of B .for C.to D with it's helpful with friends该填哪个 A to studying B studying C to It’s time _____ listen to some music.A.to B.for C.with D.of It's easy ______. A. to stay health B. stay healthy C. to st