My mother does the scrubbing and washing every day to keep the house clean.

He is majoring in ethnography at university.

On cold days, earmuffs are necessary.

This building is made of granite.

He grew up in a slum, but now he is a successful businessman.

I can fall asleep immediately after taking a sleeping pill.

China adopts the principle of people's democratic dictatorship.

He grew up in a slum and overcame difficulties to succeed.

You need earmuffs on cold days.

That information was the first time I heard of it.