There has been a recent trend in the food service industry toward lower fat content and less salt．This trend，which was started by the medical community（医学界）{#blank#}1{#/blank#}a method of fighting heart disease，has had some unintended side{#blank#}2{#/blank#}（effect） such as overweight and heart disease—the very thing the medical community was trying to fight．

    Fat and salt are very important parts of a diet．They are required{#blank#}3{#/blank#}（process） the food that we eat，to recover from injury and for several other bodily functions．When fat and salt {#blank#}4{#/blank#}（remove） from food，the food tastes as if it is missing something．As {#blank#}5{#/blank#}result，people will eat more food to try to make up for that something missing．Even {#blank#}6{#/blank#}（ bad），the amount of fast food that people eat goes up．Fast food{#blank#}7{#/blank#}（ be） full of fat and salt； by {#blank#}8{#/blank#}（ eat） more fast food people will get more salt and fat than they need in their diet．

    Having enough fat and salt in your meals will reduce the urge to snack（吃点心） between meals and will improve the taste of your food．However，be {#blank#}9{#/blank#}（ care） not to go to extremes．Like anything，it is possible to have too much of both，{#blank#}10{#/blank#} is not good for the health．

    E-commerce（电子商务）has changed the lives of people across the world. With fewer people {#blank#}1{#/blank#}(leave) home for shopping, physical stores are having a more {#blank#}2{#/blank#}(difficulty) time. It seems that one kind of physical store is not being hit—the convenience store.

    Convenience store sales in 2016 in China increased by 13 percent {#blank#}3{#/blank#}(compare) with that of 2015, according to China Daily. There are now{#blank#}4{#/blank#}(near) 100,000 convenience stores in China. And in Japan, there are 11,000 more convenience stores in 2017 than in 2010.

    Why are these 24-hour stores with {#blank#}5{#/blank#}average area of 110 square meters enjoying such rapid {#blank#}6{#/blank#}(develop)?

    One reason is that young people have grown into the habit of shopping at convenience stores, noted Convenience Store News. Convenience {#blank#}7{#/blank#}(store) not only have everything for daily use, but also fresh food like sushi, bread and salads,{#blank#}8{#/blank#} are all quite popular among young people.

    What's more, different {#blank#}9{#/blank#} supermarkets, many convenience stores sell things they make themselves, like bread and cakes. As these products can only{#blank#}10{#/blank#}(find) in these stores, many people go there just to buy them.

    Dujiangyan is the oldest man-made water system in the world, and a wonder in the development of Chinese science.{#blank#}1{#/blank#} (build) over 2, 200 years ago in what is now Sichuan Province in Southwest China, this amazing engineering{#blank#}2{#/blank#}(achieve) is still used today.

    In ancient times, the region in which Dujiangyan now stands{#blank#}3{#/blank#}(suffer) from regular floods caused by overflow from the Minjiang River.{#blank#}4{#/blank#} (help) the victims of the flooding, Li Bing, the region governor, together with his son, decided to find a solution. Li Bing, the region governor, together with his son, decided t find a solution. Li designed a series of channels built at different levels along Mount Yulei that would take away the floodwater while leaving the river flowing naturally.{#blank#}5{#/blank#} (good) still, the extra water could be directed to the dry Chengdu Plain, making{#blank#}6{#/blank#}suitable for farming.

    Once the system was finished, no more floods occurred and the people were able to live {#blank#}7{#/blank#}(peaceful). Today, Dujiangyan is admired by scientists from around the world because of one feature. Unlike modern dams{#blank#}8{#/blank#} the water is blocked with a huge wall, Dujiangyan still lets water flow through the Minjiang River naturally{#blank#}9{#/blank#} (enable) ecosystem(生态系统) and fish populations to exist{#blank#}10{#/blank#}harmony.

    Red is used in many American expressions. It can be used to show {#blank#}1{#/blank#} (happy), as in “a red letter day. This is a day when something special happens. The expression is probably based on church customs. {#blank#}2{#/blank#} almost six hundred years, church calendars have been marked with red to indicate special holy {#blank#}3{#/blank#} (day).

The expression “a red-letter day” is often heard in daily life. A red-letter day is {#blank#}4{#/blank#} day that people are feeling quite happy. You might tell your friends that yesterday was a red-letter day because you {#blank#}5{#/blank#} (win) some money in the state lottery (彩票).

    “Rolling a red carpet” is another {#blank#}6{#/blank#} (common) heard expression, {#blank#}7{#/blank#} represents a warm welcome. A city may “roll a red carpet” for {#blank#}8{#/blank#} (it) baseball team when the team arrives home after winning the championship.

    Red is also used in some expressions that {#blank#}9{#/blank#} (be) not happy. “Red-handed” is an example. To be caught “red-handed” is to be found in an act of wrong doing. For example, a mother might say she caught her son red-handed, {#blank#}10{#/blank#} (take) cookies out of the cookie jar.