Do you want to be healthier? Then go {#blank#}1{#/blank#} the passage, and you may find it's easy to keep fit.

    First, eat all kinds of foods, especially fruits and vegetables.

    You may have a favourite kind of food, but the best {#blank#}2{#/blank#}is to eat as many kinds as possible. If you eat {#blank#}3{#/blank#}foods, you're more likely to get the nutrients(营养) your body needs. Taste new foods that you {#blank#}4{#/blank#}tried before. Some foods, such as green vegetables, are very important. Have five servings(份) of fruits and three vegetables.

    Second, drink water and milk often.

When you are really{#blank#}5{#/blank#}cold water is the No. 1 choice. Kids need calcium(钙) to grow strong, and milk is a great source of this mineral (矿物质) . How much do children{#blank#}6{#/blank#}? About three glasses of milk every day.

    Third, limit screen time.

    What's screen time? It's the {#blank#}7{#/blank#}for watching TV, DVDs, and videos,{#blank#}8{#/blank#} computer games, and using the computer. If you spend much time{#blank#}9{#/blank#}these activities, you may have less time left to take{#blank#}10{#/blank#}such as playing basketball, bicycling, and swimming.

A Brief History of Time

    Stephen enjoyed writing books. In 1988 he{#blank#}1{#/blank#} A Brief History in Time. This book covered modem subjects on cosmology such as the big bang and black holes in terms that could be understood by the{#blank#}2{#/blank#} reader. The book became very popular selling millions of {#blank#}3{#/blank#}and remaining on the London Sunday Times best-seller list for four years. He had since written many more books{#blank#}4{#/blank#} A Briefer History in Time, On the Shoulders of Giants, and The Universe in a Nutshell.

    Today, an increasing number of people are always looking at their mobile phones with their heads down. These people are {#blank#}1{#/blank#} the "Heads -down Tribe". Heads -down tribe members now can be seen everywhere.

    There are more and {#blank#}2{#/blank#} traffic accidents because lots of drivers use mobile phones while driving. In order to make drivers pay more {#blank#}3{#/blank#}to driving, some new traffic rules have been made.

    As we can see above; using mobile phones may {#blank#}4{#/blank#} traffic accidents. Also, more and more interesting and strange facts happen to the "Heads - down Tribe". A man in America kept using his mobile phone on {#blank#}5{#/blank#} way home. As a {#blank#}6{#/blank#} , he knocked into a big lost bear. When he lifted his eyes from the phone, he was so afraid {#blank#}7{#/blank#}he turned around and ran away as {#blank#}8{#/blank#} as possible. Another fact is that we can often see people in the restaurant eating face to face but looking at their own mobile phones. It's strange that they don't talk to the ones who sit opposite to them during the meal. Some of them even have {#blank#}9{#/blank#} communicating with others on the phone.

    Mobile phones are helpful and necessary tools for modern life. Whether they are good or not depends {#blank#}10{#/blank#} how people use them. Let's be "healthy" users and try to be the "Heads -up Tribe".

   There are about 5, 000 different kinds of ladybugs(瓢虫) in the world. They come in many different colours. Their bright colours warn other animals or insects not to eat them. Ladybugs{#blank#}1{#/blank#}bad. A bird or a frog that eats a ladybug will remember the bright colours and it will not eat another ladybug with the same{#blank#}2{#/blank#}again. When ladybugs are{#blank#}3{#/blank#}, they will give out a fluid( 液体) that tastes terrible.

   In many cultures, the ladybug is considered to be a symbol of good luck. Most ladybugs are {#blank#}4{#/blank#} to humans. They eat other insects which destroy crops. One ladybug can eat up to 5,000 insects in its lifetime.