下列各句中，表达得体的一句是（ ）

Her unusual success shows that if someone can do their job really well, then the question ________ male or female is not so important

The book is for the students ___ native language is not English.

Thank you for sharing your ruler with me.— That’s what friends are for.

The price of food, drinks, clothes _____ so quickly these years.—Oh, no, but I don’t think so.