A field trip is a journey by a group of people to a place away from {#blank#}1{#/blank#}（they）normal environment.

    The purpose of the trip is usually observation for {#blank#}2{#/blank#}(educate), non-experimental research or to provide students with experiences outside their everyday {#blank#}3{#/blank#}(activity), such as going {#blank#}4{#/blank#}(camp) with their teachers and classmates. The aim of this research is to observe the subject in its natural state and {#blank#}5{#/blank#}(possible) collect samples(标本). In western culture people first come across this method during school years {#blank#}6{#/blank#}classes are taken on school trips to visit a geographical feature of the landscape. Much of the early research into the natural sciences {#blank#}7{#/blank#}(be) of this form. Charles Darwin is considered to be {#blank#}8{#/blank#}important example of someone who has contributed {#blank#}9{#/blank#}science through the use of field trips.

    {#blank#}10{#/blank#}(reduce) risks and expenses, most school systems now have set up field trip procedures that consider the entire trip from estimation, approval to scheduling.

    The young artist and potter Allan had a wife and two fine sons. One night, his older son developed a severe stomachache. Neither Allan nor his wife took the condition very {#blank#}1{#/blank#} (serious), but the boy died suddenly that night.

    Knowing the death could {#blank#}2{#/blank#} (avoid) if he had only realized the seriousness of the situation, he always felt he was guilty. Worse still, his wife left him a short time later,{#blank#}3{#/blank#} (leave) him alone with his 6-year-old younger son. Unable to stand the hurt and pain, he turned to alcohol and became{#blank#}4{#/blank#} alcoholic.

    As the alcoholism {#blank#}5{#/blank#} (progress), Allan began to lose everything he possessed and finally died alone in a small bar. Hearing of his death, I thought, “{#blank#}6{#/blank#} a complete failure!”

    As time went by, I began to revalue my {#blank#}7{#/blank#} (early) rough judgment. I knew Allan's now adult son, Ernie, one of the kindest and most caring men I've ever known. I hadn't heard him talk much about his father. One day, I worked up my courage to ask him what {#blank#}8{#/blank#} earth his father had done so that he became such a special person. Ernie said quietly, “As a child until I left home at 18, Allan came into my room every night, gave me a kiss and said, ‘love you, son'.”

    Tears came to my eyes as I realized what I had been a fool to judge Allan {#blank#}9{#/blank#} a failure. He had not left any material{#blank#}10{#/blank#} (possess) behind. But he had been a kind loving father, and left behind his best love.

阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。

    How do you usually buy what you need, shopping on line or going out to shop in person? With the help of the Internet, shopping is {#blank#}1{#/blank#}(easy) than before. We can just click our mouse to choose the things we like, pay for them online, and the shopping {#blank#}2{#/blank#}(finish). It is easy and quick. It helps save money, too. We can save thousands a year if we compare the prices of similar items (商品) before deciding which{#blank#}3{#/blank#}(buy).

    However, there are always{#blank#}4{#/blank#}(trap) in shopping online. If we are {#blank#}5{#/blank#}(care), we may get into trouble. For example, we may find the color of the item different {#blank#}6{#/blank#}that in the picture online. Sometimes, the size of the item we receive can be too big{#blank#}7{#/blank#}too small. To avoid such troubles, we should compare similar items on different online stores and pay more attention to what other customers say. From their opinions, we can know {#blank#}8{#/blank#}(well) about an item's color, size as well as {#blank#}9{#/blank#}(it) shortcomings. In this way we increase our chance of buying{#blank#}10{#/blank#}more satisfactory item.

    If you go out to the fields at night in spring or summer, you can hear frogs singing {#blank#}1{#/blank#}（joy） here and there. It seems as if they were performing a field symphony.

    The frog is a good and useful creature that benefits human beings. They can catch fast-moving insects. Each frog eats a large number of pests that are harmful{#blank#}2{#/blank#}crops. This little creature is regarded{#blank#}3{#/blank#}the natural enemy of pests".

    {#blank#}4{#/blank#}now frogs are getting fewer and fewer. This is because they are killed and put on the table as a delicious dish by their chief enemy, human beings. It is {#blank#}5{#/blank#}shameless and cruel act, isn't it?{#blank#}6{#/blank#}cause responsible for the rapid reduction of frogs is that farmers use insecticides （杀虫剂）to kill pests and frogs get killed as a result of drinking poisoned water{#blank#}7{#/blank#}eating poison-killed insects.

    Something must be done without delay{#blank#}8{#/blank#}（save）frogs. If we don't punish those{#blank#}9{#/blank#}sell and kill frogs to make money, then one day all of us {#blank#}10{#/blank#}（punish） by nature for failing to keep the balance of nature.

    In the beginning, the computer was as large as a room. This worried the designers. As time went by, it became smaller and smaller. With artificial intelligence, it was getting {#blank#}1{#/blank#} (smart) and quicker. In the early 1960s, computers {#blank#}2{#/blank#} (connect) by a network, which enabled their users to share information with others. Since the 1970s, computers {#blank#}3{#/blank#} (become) very important in communication, finance and trade.