California is the third largest state in the USA but has the largest population. It also has the{#blank#}1{#/blank#} of being the most multicultural state in the USA, {#blank#}2{#/blank#} people from all over the world. The customs and languages of the immigrants live on in their new home. This diversity of culture is not{#blank#}3{#/blank#} when you know the history of California.

    People from different parts of the world, attracted by the climate and the lifestyle, still immigrate to California. It is believed that before long the mix of nationalities will be{#blank#}4{#/blank#} great that there will be no distinct major{#blank#}5{#/blank#} or cultural groups, but simply a mixture of many races and cultures.

    Although at present human egg cells and embryos{#blank#}6{#/blank#} for cloning research are difficult to obtain, newspapers wrote of evil leaders{#blank#}7{#/blank#} to clone themselves to attain their ambitions. Religious leaders also raised moral questions. Governments became nervous and more conservative. Some began to reform their legal systems and{#blank#}8{#/blank#} research into human cloning, but other countries like China and the UK, continued to accumulate evidence of the {#blank#}9{#/blank#} medical aid that cloning could provide. However, scientists still wonder whether cloning will help or harm us and{#blank#}10{#/blank#} it is leading us.

    Yuan Longping is one of China's most famous scientists. {#blank#}1{#/blank#}(work) the land to do his research, he considers himself a farmer. Indeed, his sunburnt face and arms and his slim, strong body are just like those of millions of Chinese farmers, {#blank#}2{#/blank#} he has struggled for the past five decades. When he was young, he saw many people dying of {#blank#}3{#/blank#} (hungry), which was a {#blank#}4{#/blank#}(disturb) problem in many parts of the countryside. Then, he devoted all his time and energy {#blank#}5{#/blank#}searching for a way to increase rice harvests without expanding {#blank#}6{#/blank#} area of the fields. In 1973, he became the first agricultural pioneer in the world {#blank#}7{#/blank#} (grow) rice that has a high output. Now, he remains {#blank#}8{#/blank#}(circulate) his knowledge in many less developed countries to increase their rice harvests. He is quite {#blank#}9{#/blank#}(satisfy) with his life. However, he doesn't care about being famous. He feels it gives him less freedom to do his research. In his view, spending money on himself or {#blank#}10{#/blank#} (lead) a comfortable life means very little to him. He therefore gives much money to equip others for their research in agriculture.

    The city of San Francisco is a wonderful vacation destination that offers many {#blank#}1{#/blank#}  (difference) things to see and do. Those experiencing a lively city with a wealth of shopping and dining opportunities {#blank#}2{#/blank#} (be) very happy. Those looking for a city that{#blank#}3{#/blank#} (offer) museums, art galleries, and very interesting historical sites will also be happy if they choose San Francisco. Many people don't realize it, but people {#blank#}4{#/blank#}  look for an interesting place to get out {#blank#}5{#/blank#}  enjoy nature will also appreciate San Francisco. When touring {#blank#}6{#/blank#}  city by walking, you aren't going to cover as much ground. There are far more {#blank#}7{#/blank#}  (benefit) to touring the city on foot though. This type of tour allows you {#blank#}8{#/blank#}  (see) more buildings that others driving by cars can't see. You may even get to enter different facilities that those touring the city from the streets do not. A tour of the city on foot also {#blank#}9{#/blank#} (usual) focuses on a more localized neighbourhood level, which can be very{#blank#}10{#/blank#}  (excite) in a number of different ways.

    Everyone needs to know how to prevent a fire. It is also important to know what to do when it {#blank#}1{#/blank#}（break）out .

    Every year, over 11, 000 people {#blank#}2{#/blank#}（kill）or injured in house fires. These fires could have been avoided. Smokers who are {#blank#}3{#/blank#}（care）cause about 200 deaths and over 6,000 fires. More than half of those {#blank#}4{#/blank#} die in fires are poisoned or harmed by smoke.

    If fire happens, do not attempt to fight the fire unless it is small. Try putting out a small fire with water. If {#blank#}5{#/blank#} fire has spread or if the flames are more than 20 inches high, shut the door on it. Warn everyone else in the building and tell them to get out. You should leave and dial 119for the fire department.

    Before {#blank#}6{#/blank#}（go）into a room, check the door. If the handle or the door is hot, do not open it! Instead, put clothing or a wet towel at the bottom of it to keep smoke out. If the door is not hot, open it {#blank#}7{#/blank#}（slow）. If there's a rush of smoke or heat, close it again and shout to warn {#blank#}8{#/blank#}（other）in side.

    Now open the window and shout “Fire!”. See whether you can drop safely to the ground. Use this {#blank#}9{#/blank#} your escape course if you can. If you are not on ground level, break your fall by pushing a mat out first. Lower yourself at arm's {#blank#}10{#/blank#}（long）before dropping. Once outside, stay outside and make sure the fire department is called.