You’ve just hiccupped (打嗝) for the tenth time since you finished dinner. Wonder【小题1】these funny noises are coming from? The part 【小题2】(blame) is your diaphragm, the muscle at the bottom of your chest. All hiccups start here.

The diaphragm almost always 【小题3】(work) perfectly--it pulls down when you breathe in to help pull air into the lungs 【小题4】 it moves up when you breathe out to help push air out of the lungs. But sometimes the diaphragm becomes upset, and when 【小题5】happens, it pushes up in an irregular way, making your breath come out differently 【小题6】how it normally does. When this irregular breath hits your voice box, you’re left with a big hiccup. Things 【小题7】bother the diaphragm include eating too quickly or too much, stomachaches or feeling nervous.

If you want to know 【小题8】to get rid of hiccups, here are some “cures”. 【小题9】(breathe) into a paper bag is one method some people use. Others think taking a mouthful of water is the way to become hiccup-free. Sugar under your tongue might also drive away the hiccups. And maybe the most famous 【小题10】(treat), having someone scare you, also helps beat the hiccups.

Dujiangyan is 【小题1】 oldest man - made water system in the world, and a wonder in the 【小题2】 ( develop ) of Chinese science. Built over 2,200 years ago in Sichuan Province, this amazing system is still used today.

In ancient times, the site on which Dujiangyan now stands suffered 【小题3】 regular floods caused by the Minjiang River. To help the people of the flooding, Li Bing, together with his son,decided 【小题4】 ( 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. Better still, the extra water could be directed to the dry Chengdu Plain, making it 【小题5】 ( suit ) for farming. Once the system was 【小题6】 ( finish ), no more floods hit the area and the people were able to live 【小题7】 ( peaceful ).

Today, Dujiangyan is admired by 【小题8】 ( scientist ) from around the world because of one feature. Unlike modern dams 【小题9】 the water is blocked(阻挡)a huge wall, Dujiangyan still lets water go through the Minjiang River naturally, enabling ecosystem(生态系统) 【小题10】 fish populations to exist in harmony.

It’s a popular 【小题1】 (believe) that fish can’t remember anything for longer than seven seconds. It may seem sad to think that they don’t remember what they’ve eaten or 【小题2】 they’ve been, and they don’t recognize you or any of their friends —every moment in their lives would be like seeing the world for the first time. But don’t be so quick to feel sorry for them. A recent study 【小题3】 (find) that fish have much 【小题4】 (good) memories than we used to think. In fact, certain species of fish can even remember events from as long as 12 days ago.