He solved the problem with creative thinking.

He is interested in the Song pronunciation.

The doctor told him that he might have been infected with syphilis.

The destruction of the ozone layer has a significant impact on the Earth's climate.

She had her ovaries checked by a doctor due to a problem.

She is researching about medieval chastity belts.

She is researching about the chastity belts of medieval Europe.

He opened the window to let fresh air into the room.

I bought a new drying machine.

In this chemical experiment, we will use litharge.