TEXT G First read the following questions. 83.This passage is mainly about _____. A. the survival of the dinosaur B. how the crocodile has survived C. animals that live to be very old D. animals that have existed for a long time 84.According to the passage, the crocodile A. survived an attack by dinosaurs B. first appeared 100,000 years ago C. has increased in size over time D. has existed for millions of years Now read Text G quickly and select your answers. Some kinds of animals that are still around today were in existence millions of years ago during the time of the dinosaur. One of these survivors is the crocodile, which has been around for about 100 million years. Todays crocodiles can grow to a length of 20 feet and weigh about a ton. Their prehistoric ancestors were about two-and-a-half times the size of todays animals. Another survivor from the past is the Galapagos tortoise, whose history goes back around 200 million years. The tortoise of today has not evolved much over last 200 million years; it looks about the same now as it did way back then. The oldest survivor from prehistoric times is, can you believe it, the cockroach. Cockroaches have been able to stick around for more than 250 million years. The main reason for their incredible endurance is their ability to live in all kinds of conditions and survive on all kinds of food.
　　83. This passage is mainly about _____.
　　A) the survival of the dinosaur
　　B) how the crocodile has survived
　　C) animals that live to be very old
　　D) animals that have existed for a long time
　　84. According to the passage, the crocodile
　　A) survived an attack by dinosaurs
　　B) first appeared 100,000 years ago
　　C) has increased in size over time
　　D) has existed for millions of years
　　TEXT H First read the following questions. 85.What is the authors main purpose in the passage? A. To explain a chemical reaction. B. To recommend a cure for arthritis. C. To introduce a new product. D. To compare central heating with the body warmer. 86.In the second paragraph, the word "it" in "To get it going" refers to _____. A. arthritis B. muscle sprains C. the body warmer D. moisturized wood powder Now read Text H quickly and select your answers. Even if the saying "cold hands, warm heart" were really true, the warmhearted probably would prefer to give up frozen fingers during the winter. In Japan, where central heating is still something a luxury, Aoi Co., Ltd. has been distributing a small, disposable hand-and-body warmer that makes use of a harmless chemical reaction in order to generate heat. This winter the Poco body warmer is making its debut in Canada, the United States and parts of Europe. In addition to chasing away winter chills, the body warmer can be used to help relieve pain that results from muscle sprains and arthritis. The Poco body warmer measures about three by five inches and is one-quarter inch thick. It consists of a cloth bag containing a mixture of iron powder, moisturized wood powder, activated carbon and salt. To get it going, the user simply opens the outer vinyl bag in which the unit is vacuum-packed and shakes the cloth bag. The unit then absorbs oxygen from the air, which in conjunction with the moisture from the wood powder oxidizes the iron, giving off heat. The packet maintains an average temperature of 140 degrees Fahrenheit for 24 hours, according to the manufacturer. Aoi Co. officials say that the product contains no toxic chemicals. The only precaution users need to follow is to avoid direct contact between the skin and the body warmer because burns can occur. The unit sells for about 1.
　　85. What is the author's main purpose in the passage?
　　A) To explain a chemical reaction.
　　B) To recommend a cure for arthritis.
　　C) To introduce a new product.
　　D) To compare central heating with the body warmer.
　　86. In the second paragraph, the word "it" in "To get it going" refers to _____.
　　A) arthritis
　　B) muscle sprains
　　C) the body warmer
　　D) moisturized wood powder