You've just hiccupped (打嗝) for the tenth time since you finished dinner. Wonder____these funny noises are coming from? The part ____(blame) is your diaphragm, the muscle at the bottom of your chest. All hiccups start here.

    The diaphragm almost always ____(work) perfectly--it pulls down when you breathe in to help pull air into the lungs ____it moves up when you breathe out to help push air out of the lungs. But sometimes the diaphragm becomes upset, and when ____happens, it pushes up in an irregular way, making your breath come out differently ____how it normally does. When this irregular breath hits your voice box, you're left with a big hiccup. Things ____bother the diaphragm include eating too quickly or too much, stomachaches or feeling nervous.

    If you want to know ____to get rid of hiccups, here are some “cures”.____ (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 ____(treat), having someone scare you, also helps beat the hiccups.

美国学者米勒模拟原始地球的条件和大气成分，在一个密闭的装置中合成了多种氨基酸．据此实验可推测，地球上最早的生命起源于（  ）