23.Today,we take washing machines for granted,but there was before 1869.
.---It is reported that there is _____ big breakthrough in the cancer treatment. ---If only my son could be brought back to _____ life!
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."