By the time he was 14, Mozart many pieces of music.
Scientists have created the world’s smallest "snowman",_____ about a fifth of the width of a human hair.
—Late again! Where _____?—Sony, I in the heavy traffic, or I would have been here earlier.
—Do you know why the teacher asks for me?—He wants you to _____ your absence last night.
—What does the sign over there read?—"No person smoke or carry a lighted cigarette, cigar or pipe in this area."
—Is that Dec.21,2012 is the end of the world true?—Definitely not, but ______ must be paid to global climate change.