Why do people yawn?Why do people yawn?Q: Why do peopleyawn(打哈欠)?A: A yawn isdefined(定义) as "To open...或厌倦)." As to why we yawn, no one is really sure. Many scientists think that it is the body's way ……

Why do bees have sticky hair?(Key on Page 5) ……

. But some of them have funny habits. Do you know why?Why do giraffes have such long necks?Long ago... to the story.1. Why do chameleons change color?Because ___________________2. Why do girraffes have long ……

Humans lost use for tails为什么人没有尾巴？Q: Why don't we have tails?A:We don't have tails because we don... do, however, have tailbones. Our tailbone acts as a kind of shock absorber for ourspine(脊椎) when we ……

学语法Why ...Because ...Why can’t we hold in our sneezes (喷嚏)? Why do we weigh less in the morning... of these mysteries. Take a look!------------------------Why do we weigh less in the morning?Some people say ……

.jin@21stcentury.com.cn before October 4, 2009.Winners from the last pictureBaby: Mom, why do we have big mouths?Mom: Because we must drink water quickly and eat a lot of food.Baby: Why do we have big ……

. That is why we can't see them. Most birds have a good sense of hearing, which they use to listen...Do birds have ears?鸟儿有耳朵吗？Q: Do birds have ears?A: Yes, all birds have ears. They can hear as well ……

Why did Andy do that? I'll have a talk with him tomorrow.Don't give him a hard time; we've all done stupid things.give someone a hard time:批评某人，与……某人过不去 ……

with me to the bus stop?John: No.Uncle Peter: Why not?John: Because my mother says as soon as you go, we are going to have supper.Half of that is mineBob: Alex, why do you drink up the water? We said ……

. But have you ever tried to tickle yourself? If you have, you might have noticed that it doesn’t do anything at all. Do you know why?This may have something to do with our brain (大脑), Discovery magazine said ……

与众不同 Harris: Do you want to eat dinner at my house? We eat dinner in the bathtub1. Josh: Why? You should eat dinner in the dining room.Harris: We sleep in there.Josh: Don't you have a bedroom?Harris ……

of plastic garbage, about the lack of love in our community – we never stop complaining. However, have you ever thought about what we can do to improve the situation? Complaining won’t solve any problems ……

as “What have you achieved so far?” and “What do you want to do in the future?” But here is my query: What about now? We ask ourselves: “Why do we study? To get a degree. Why do we need a job? To make money ……

many questions, as all children naturally do. “Mother, why do we have a hump (驼峰) on our... thirst.” “But mother, why do we have long eyelashes (睫毛)?” he continued.  ……

many questions, as all children naturally do. “Mother, why do we have a hump (驼峰) on our... thirst.” “But mother, why do we have long eyelashes (睫毛)?” he continued.  ……