Women prefer to buy food which has already been prepared ______it reaches the market．

__________ is human nature that a great many people are often willing to sacrifice higher pay for the privilege of becoming white-collar workers.

His father looksyoung, but in fact he is ______.

mother _____ all the cleaning for my family, but recently she has been too busy teaching to do it.

What do you think of Mr. Li’s teaching—No one is _________. He’s my favourite teacher.