Many of the most interesting questions in each area remain open and are being actively worked on.

It appears to have seen little use in either role, and is no longer being actively worked on.

He also actively works to promote science in the public.

He continued to work actively in these fields until his death.

Even if we aren't moving around, our backs are actively working.

He actively worked in Italy for two years between 1907 and 1909.

All but two of the artists are alive and actively working.

She actively worked in support of the Panthers' defense team.

"Provided someone in the group isn't actively working to prevent it."

She also worked actively for a number of children's charities.