The teacher can _____ believe that Tom studies so ______.
—What do you think of the 3D-printed ______?—I’m afraid they are not safe enough to live in.
—Linda, how can I keep fit?—Well, ______ apple a day keeps ______ doctor away.
--- We failed in the singing competition.--- ______ . Better times are waiting for you.
--- Do you believe what he said ?--- No , never. It ________ be true.
--- Do you want to eat here?--- No. Just fish and chips to , please.