句型转换

小题1:Lucy has a round face.（改为否定句）

Lucy                               a round face.

小题2:This is his knife.（改为复数形式）

               are their               .

小题3:My bike is red.（对划线部分提问）

                              is your bike?

小题4:Are those apples?（作否定回答）

No,                        .

小题5:You have a wide mouth.（改为同义句）

Your mouth                              .

系统设计的依据是【 】。