What do you want to be in the future，Nick?—I want to be__________ pilot. It is________ exciting job.

Follow your teacher’s advice, _______ you’ll make great progress in your English.

By the time my parents reached home yesterday, I __________ the dinner already.

Only when your identity has been checked, ___________.

As we know, paper is made ________ wood , that is to say wood is made ______ paper.