单选题The author quotes Coleridge in order to______.
单选题You ______ get a new bicycle as a reward for doing well in the following final exam. A. must B. will C. shall D. should
单选题Son: May I play my computer game for an hour? Father: _____.
单选题The floods did not start to ______ until two days after the rain had stopped.
单选题Our earth is full of sound because it is full of ______ like trucks rolling along the highway or jets climbing into the sky.
单选题Would you spare some time to have a chat with me ( ) a cup of coffee?
单选题I had just posted the letter when I remembered that I hadn't ______ the cheque.
单选题Woman: Thank you very much for your help.Man:______
单选题By comparison, the author considers that ______.
单选题Only by reading extensively ______ you horizons.
单选题选出下面读音不同的选项（）。
单选题Man: Excuse me, madam. May I sit here?Woman: ______
单选题Not until the advent of histochemistry could the anatomist see through the microscope which cells carry specific enzymes or gauge how active these enzymes are in different cells under various conditions. A. discern B. grasp C. measure D. estimate
单选题Tom qualified ______ an engineer before attending a business school. A. like B. as C. with D. to
单选题You used to go swimming in the lake before it became polluted, ______?
单选题The agriculture revolution in the nineteenth century involved two things: the invention of labor-saving machinery and the development of scientific agriculture. Labor-saving machinery naturally appeared first where labor was scarce. "In Europe," said Thomas Jefferson, "the object is to make the most of their land, labor being sufficient; here it is to make the most of our labor, land being abundant." It was in America, therefore, that the great advances in the nineteenth century agricultural machinery first came. At the opening of the century, with the exception of a crude(粗糙的) plow, farmers could have carried practically all of the existing agricultural tools on their backs. By 1860, most of the machinery in use today had been designed in an early form. The most important of the early inventions was the iron plow. As early as 1890 Charles Newbolt of New Jersey had been working on the idea of a cast-iron plow and spent his entire fortune in introducing his invention. The farmers, however, would home none of it, claiming that the iron poisoned the soil and made the weeds grow. Nevertheless, many people devoted their attention to the plow, until in 1869, James Oliver of South Bend, Indiana, turned out the first chilled-steel plow.
单选题It could be inferred from the last paragraph that______
单选题
单选题At the time when this article was written, the situation for doctors in Philadelphia seemed to be
单选题To ______ the world peace has been one of the most crucial functions of the United Nations since it was founded in 1945.