【正文】 s more genetics to be studied.2) (Open) 。ll get those square carrots.”Exercise D Afterlistening Discussion Directions: Listen to the passage again and discuss the following questions. 1. Chef Alford’s request: If we could get square carrots, it would be great. If you could get a nice long, a tomato as long as a cucumber, where you could get 20 or 30 slices out of them, it would be great. Van der Knaap’s opinion is that the long, thin tomato hasn39。s got a request of Dr. van der Knaap.8. “Once we know all the genes responsible for making different shapes in tomatoes, Van der Knaap says we39。ll have a better idea of what controls the shape of other crops, such as peppers, cucumbers and gourds. Exercise C Detailed Listening Directions: Listen to the passage and answer the following questions. 1. Bananas and Onions are the examples known as much by their shape as by their color or taste. 2. The hybrid or crossbreeding technique is regarded as the traditional way of changing the shape of fruits.3. The genetic technique which can also change the shape of fruits.4. They discovered the SUN gene and managed to clone it in tomatoes.5. Compared with round tomatoes, square tomatoes might be easier to work with than the mon round tomatoes.6. The difference between what his brother and lots of other folks have been doing and what van der Knaap is doing is the difference between crossbreeding and locating a specific gene that affects the shape of tomatoes.7. There39。ll have a better idea of what controls the shape of other crops, such peppers, cucumbers and gourds. And maybe then we39。t worked out just yet. She says there39。s got a request of Dr. van der Knaap.ALFORD:re trying to make uniform, symmetrical shapes out of curvy and pointed vegetables. There39。ve been able to clone it in tomatoes.Van der Knaap39。s one gene. One gene can make that difference. Van der Knaap39。re at the Ohio State Agricultural Research and Development Center in Wooster. Van Der Knaap points out short, round tomatoes and some oddlooking long, thin ones.VAN DER KNAAP:s Nest stadium in Beijing and the pyramids in Egypt will join the Sydney Opera House in dimming their lights as part of Earth Hour.2. Ban Kimoon has said it was the biggest climate change demonstration ever attempted.3. Organizers are hoping that up to a billion people will participate in an international effort to cut greenhouse gas emissions, which many scientists blame for a warming climate.4. Andy Ridley, One of the architects of Earth Hour, says the current financial meltdown should not be used as an excuse to delay environmental reforms.5. In two years, the event has bee a large global movement and its aim is to create an enormous wave of public pressure that will influence delegates at a meeting in Copenhagen later this year.Part 2 PassageLab produces shapeshifting fruits and vegetables Many fruits and vegetables we know almost as much by their shape as by their color or taste. Bananas are long and curved. Onions are round. But what if you could alter the familiar shape? Would a square tomato still be a tomato?Scientists are learning how to change the shape of fruits and vegetables so they can be harvested or processed more efficiently, or maybe just to reduce waste in the kitchen. It can be done to some extent with traditional hybrid techniques.s Nest stadium in Beijing and the pyramids in Egypt will join the Sydney Opera House in dimming their lights as part of Earth Hour. The global event has been endorsed by the SecretaryGeneral of the United Nations. Ban Kimoon has said it was the biggest climate change demonstration ever attempted. Mr. Ban urged people everywhere to pressure their governments to take decisive action to cut carbon pollution. Organizers are hoping that up to a billion people from small villages in Namibia to sprawling cities in Asia will participate in an international effort to cut greenhouse gas emissions, which many scientists blame for a warming climate. One of the architects of Earth Hour, Andy Ridley from the conservation group World Wildlife Fund (WWF), says the current financial meltdown should not be used as an excuse to delay environmental reforms. The global economic crisis has proved that we are a global munity, so when America goes bad, we all go bad and climate change is going to be on a scale that is way, way beyond our global economic crisis at the moment and we need to put in place the measures to a) slow that down and ideally halt it, b) be ready for economies that will have to change. So, the longer we procrastinate the more we pay the penalty so we need to move quickly, he said. Earth Hour was started by environmentalists in Sydney in 2007. It encourages households, businesses and governments to switch off all nonessential lights for 60 minutes in a show of unified concern for the health and future of the planet. In two years, the event has bee a large global movement and its aim is to create an enormous wave of public pressure that wi