May always work hard,so she does well in all subject.(改成同义句)（ ）May always works hard,she does well in all subjects.

May always work hard,so she does well in all subject.(改成同义句)（ ）May always works hard,she does well in all subjects.
May always work hard,so she does well in all subject.(改成同义句)
（ ）May always works hard,she does well in all subjects.

May always work hard,so she does well in all subject.(改成同义句)（ ）May always works hard,she does well in all subjects.
Because May always works hard,she does well in all subjects.

Because

Becuase/As May always works hard,she does well in all subjects.
希望能够帮到楼主

As/For

because

Because