By the time you have finished this book, your meal ______ cold.
The box is so heavy that he cannot lift it. _______, he is only a ten-year-old child.
--- Is this book familiar ______ you? --- Sure. I am also familiar ______ its writer.
The place _______ I visited last summer is just the place _______ I spent my childhood.
The machine has ______ again; I think we’d better buy a new one.
Recently I have bought an iPad on the website of taobao.com, _______ the price is very reasonable.