IT TOOK THE DIRECTOR TWO HOURS _____________________________________

70. It took the director two hours _____________________________________.A. explaining us the new plan B. to explain us the new planC. explaining the new plan to us D. to explain the new plan to usIX. Read the passage and mark the letter A, B, C or D to indicate the correct answer to each of thequestions from 71 to 80.The development of genetically modified (GM) plants and animals had led to a huge global controversy.Opponents say that GM “Frankenfoods” are a threat to our well-being, and proponents say that the risks areminimal. There is one aspect of the war over GMthat is often overlooked. Anyone who wears a cotton shirtthese days is using a GM crop. Cotton is the only major non-food GM crop at present, but others are coming.GM cotton plants that is not food has not stopped the most passionate GM opponents from objecting. IfGM cotton is grown in a field next to fields of non-GM cotton, they argue, then how to keep genes from beingtransferred from field to field. This danger, however, is not as compelling to the public as possible healthhazards in food, so there is no great fury over GM cotton.GM cotton seeds produce higher yields, and they do without the need for pesticides. Planting of GMcotton has increased fivefold since 1997; three-quarter of cotton in America, and over half in China, is nowGM. Farmers like it because it increases their profits.Other options for non-food GM include new variety of flowers with different colors or scents, toughergrasses for lawns, and plants designed to soak up pollutants from the soil. The paper industry providesanother example of potential for GM to help produce better and cheaper products. Paper is made from pulp,and pulp is generally made from trees. Researchers in New Zealand and Chile have been working on insect-resistant pines, and a Japanese firm has combined carrot genes with tree genes to make them grow better inpoor soil.Another interesting case is that of tobacco. It is not food crop, but it is consumed, and GM tobaccoplants with both more and less nicotine have been created. The tobacco plant, however, is an ideal target forGM, since its genetics are very well understood and it produces a lot of leaves. The value of the drugs thatcould be produced by GM tobacco is so high, many farmers couldswitchfrom growing tobacco for cigarettesto growing it for medicine. Since medical cost is rising, consumers would also be happy to use drugsproduced in bulk by GM tobacco.