C．It can move very fast in busy places.

　　D．It can sense the suitcase's location.

　　B　[细节理解题。根据第二段第二句"The smart suitcase uses facial recognition software to follow its owner as he or she is checking in or heading to the gate"可知，CX­1的特点是它可以识别和跟随它的主人。]

　　2．Who would most probably want an Aibo?

　　A．People who want a dog but can't look after a real one.

　　B．People who often play tricks on others.

　　C．People who want to take high­quality photographs.

　　D．People who want to walk a dog.

　　A　[推理判断题。根据第三段第一句"Sony's latest version of the Aibo robotic dog is almost as fun as the real thing-but with much less work"的描述可推知，想要Aibo的是那些想要一只狗但不能照顾一只真正的狗的人。]

　　3．Which product can help people work out regularly in a gym?

　　A．CX­1. B．Aibo.

　　C．Forpheus. D．Black Box VR.

　　D　[推理判断题。根据最后一段的内容尤其是"Using it，gym users will find themselves fighting enemies，including big creatures-all while getting exercise"的描述可推知，Black Box VR这种产品可以帮助人们经常在健身房锻炼。]

　　B

　　British scientists have done something that many people thought was impossible：they created the first clone of an adult mammal(哺乳动物)．The clone，named Dolly，is a seven­month­old sheep，grown from a cell of an adult female sheep.

　　What is a clone？A clone is a copy-a genetic copy.Genes are the instructions for life.They tell a cell what to do and how to do it.Genes make each individual plant or animal different and unique.But a clone has the same genes as the original organism(生物体)．

Cloning is not new.Plants have been cloned for centuries.New plants are often grown from cutting from another plant.Also，plants like pineapples，strawberries and carnations(康乃馨)are sometimes cloned. One benefit of cloning is that we can make