Question

The sewing machine which you (use) at present (invent)in 1930 by a French

Answer 1

The sewing machine which you (use)are using at present (invent)invented in 1930 by a French

Answer 2

 

The sewing machine which you are using at present invented in 1930 by a French

 

Answer 3

The sewing machine which you are using at present invented in 1930 by a French

Answer 4

the sewing machine which you are using at present invented in 1930 by a French