1.Now I can`t find ()book about elephants

1.Now I can`t find ()book about elephants
Is it ()old picture book on the desk?
A.a the B.the a C.an an D.the an
2.there is a big bedroom to live i（）,but I still don`t think it is a good place to live()
A./ in B.in in C./ / D.in /
3.they () leave the railway station until he comes back
A.won`t B.will C.don`t D.can
4.Sam,()make your new T-shirt()again
A.doesn`t ;dirty B.don`t;dirtier C.doesn`t ;dirtier D.don`t;dirty