She used to be a prostitute, but now she has started a new life.

He was hiding the fact that he was an illegitimate child.

I'm sorry, but I don't speak Japanese.

I'm a Muslim, so I fast during Ramadan.

I'm Jewish.

My major is chemical engineering.

He is an expert in nuclear physics.

He went to school with his new schoolbag.

He is an expert in enzymology and conducts many researches.

We are planning to go to the science museum this weekend.