The Abbey Road pedestrian crossing in Northern London is one of the world's most famous {#blank#}1{#/blank#} it is on the cover of Beatles album. Now, the British government {#blank#}2{#/blank#}(put) it on the list of national heritage sites.

    {#blank#}3{#/blank#} (normal), only buildings and other architectural sites get the award. It is the first time {#blank#}4{#/blank#} a section of street became part of {#blank#}5{#/blank#} (Britain) National Heritage. The crossing is near the Abbey Road studios {#blank#}6{#/blank#}the Beatles made most of their records. Today it can {#blank#}7{#/blank#}(see) around the world on a special webcam(网络摄像头). The studio building {#blank#}8{#/blank#}(it)became listed by British Heritage last February. The photographer of the picture said he only had 10 minutes {#blank#}9{#/blank#}(take) it. It became one of the most famous album covers of all times. The Abbey Road album was {#blank#}10{#/blank#}last one the Beatles completed before they broke up.

    Each zebra has its own unique pattern of distinctive stripes (带), just {#blank#}1{#/blank#}humans have their own unique pattern of fingerprints, Zebras stick together in herds (兽群). Within a herd, zebras tend {#blank#}2{#/blank#} (stay) together in smaller family groups. Families are generally made up of a male, several females{#blank#}3{#/blank#}their young.

    As zebras graze, they use their sharper front teeth to bite the grass, and then use their duller back teeth to crush and grind. A zebra's teeth keep growing for{#blank#}4{#/blank#} (it) entire life, because constant chewing{#blank#}5{#/blank#}(wear) them down.

    Zebras are{#blank#}6{#/blank#} (constant) on the move to find fresh grass and water. Sometimes they gather in huge herds of thousands as they migrate to better feeding{#blank#}7{#/blank#} (area). They often travel in{#blank#}8{#/blank#} (mix) herds with other grazers and browsers, such as wildebeest.

    Zebras groom (理毛) one another, If you see two zebras standing close{#blank#}9{#/blank#} each other and it looks like they're biting each other, don't worry. They're pulling loose hairs off each other as they groom. Grooming also feels good to a zebra—it's like having an itch scratched,

    While most zebras are least endangered, Grevy's Zebra{#blank#}10{#/blank#} (classify) as endangered.

    UN Chinese Language Day {#blank#}1{#/blank#} (celebrate) yearly on April 20. This year, Doreen Hynd was among those invitees, who are either experts on the Chinese culture {#blank#}2{#/blank#} have a special skill related to it.

    Hynd astonished all those present while performing Tai Chi, {#blank#}3{#/blank#} Chinese martial (武术的) art form, at an event held by the UN Tai Chi Club. The audience could hardly believe she was a 93-year-old grandma. It was definitely amazing that she could bend her body and raise her leg so {#blank#}4{#/blank#} (easy) and keep herself still standing on one leg.

    Hynd owes (归功于) all this to her continuous practice of Tai Chi.

    Born in Australia in 1925, Hynd began Tai Chi training in her 50s and then moved to the US, {#blank#}5{#/blank#} she later became an instructor herself.

    When {#blank#}6{#/blank#} (ask) about the greatest benefit she gained from Tai Chi, Hynd said, “balance.” Hynd has been teaching people of all ages and different {#blank#}7{#/blank#} (culture) backgrounds how to practice Tai Chi. They have benefited greatly from their association with the Chinese culture. They've developed a balanced state of mind and improved their health after {#blank#}8{#/blank#}（month）of practice. Tai Chi allows these people {#blank#}9{#/blank#}（understand）that, from the perspective（视角）of yin and yang, all things are closely connected with each other. This might be where the attraction of Tai Chi {#blank#}10{#/blank#}（lie）. Hynd enjoys sharing this great gift from China with her students.

    I paid a visit {#blank#}1{#/blank#} Cambridge last January. Though the trip took me 5 hours and it rained the whole day with strong winds, the town deserved a visit.

    The bus started at 6:10 am. It stopped at 4 stops before we finally arrived, {#blank#}2{#/blank#} wasted more time than we had expected. {#blank#}3{#/blank#}(tire) with long time of sitting, one passenger stood up to relax his numb (麻木的) legs. The driver asked him to sit down but in vain. So he pulled up and said {#blank#}4{#/blank#} (serious), "You either get off or sit down." To him, {#blank#}5{#/blank#} (safe) was the first policy.

    Cambridge consists of nearly thirty colleges. The {#blank#}6{#/blank#} (old) part of the university was built in the 13th century {#blank#}7{#/blank#} the newest was founded in the mid-1960s. The number of the students {#blank#}8{#/blank#}(be) so great that many students live in lodgings（出租房）and move into college for their final year.

    The heart of Cambridge has shops, pubs, and supermarkets, but most of it is university colleges, departments, libraries and other places for university staff and students. Students fill the shops, cafes, banks and churches, {#blank#}9{#/blank#} (make) them as well part of the university.

    With over 10,000 undergraduates and postgraduates, the town is a busy place indeed. Students here are not allowed {#blank#}10{#/blank#} (keep) cars. If you happen to be walking in the street during a break, you'd better stop for a moment to avoid the sea of bicycles hurrying in all directions, which carry students from one college or a lecture room to another.

    NASA has a new job listing, and it's no joke. The US space agency is looking for a "joker" to join their {#blank#}1{#/blank#} (plan) mission to Mars.

A mission to Mars is no laughing matter. {#blank#}2{#/blank#} is known that Mars is 225 million kilometers away from Earth. A trip there would take around eight months in a small spacecraft. "When you're living with others in a confined (封闭的) space for a long period of time, such as on a mission to Mars, problems are likely {#blank#}3{#/blank#} (happen)" Jeffrey Johnson, a scientist at the University of Florida, {#blank#}4{#/blank#} (say) to the Guardian. This is probably {#blank#}5{#/blank#} NASA wants an astronaut with a sense of humor. "These are people that have the {#blank#}6{#/blank#} (able) to pull everyone together." Johnson said.

    In {#blank#}7{#/blank#} (stress) situations, perhaps humor is a way to know we aren't alone. We can share our stress by {#blank#}8{#/blank#} (laugh) together. Then we can focus on our jobs instead of just worrying.

But if you're hoping that your favorite TV comedian will fly to Mars, that {#blank#}9{#/blank#} (possible) won't happen. "Being funny won't be enough to land somebody the job," Johnson said, "They also need to be an excellent scientist and engineer." Besides, it's required that they {#blank#}10{#/blank#} (be) in top physical condition.