Viết lại câu

Câu 1 This is the first time I've painted a musal over graffiti
= I've never
Câu 2 Mr Binh started recyling rubbish two years ago 
= Mr Binh 
Câu 3 David failed the exam because of his  laziness
= because david
Câu 4 The garden party won't take place if the weather doesn't emprove 
= Unless 
Câu 5 I would like six apples (dozen)
= 
Câu 6 We haven't got any tomatoe (there)
=
Câu 7 They built this house in 1990
=