We are planning to hold a big banquet this weekend.

He restrained himself from expressing his opinion.

This commercial is very interesting, isn't it?

Citrate plays an important role in organic chemistry.

In chemistry class, I learned about basic oxides.

Will you marry me?

"Do you want to have a meal? Take a bath? Or choose me?" she said jokingly.

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.