I can’t find my pen．Could you lend me ________ ?—Sorry，I’m using it__________．

We should eat a balanced diet to keep healthy.

Is your father a doctor in No.2 Hospital?—No, he ___________ a farmer and now he is a driver.

In ________ old society many young women died by so strange and cruel ________ custom.

Which place do you prefer to live in, a city or a countryside?– I don’t care. ______ is fine.