类的) dinosaurs had very long necks. They evolved (进化出) long necks to eat lots of food without moving too much... without moving too much.Dinosaurs with long necks may have slept like today’s giraffes. When ……

. They evolved (进化出) long necks to eat lots of food without moving too much.Sauropod (蜥脚类的) dinosaurs had very long necks. They evolved (进化出) long necks to eat lots of food without moving too much.Dinosaurs ……

the show, use a low voice. Don’t eat during the show.Cafeterias will be quite busy. Do not stay too long.... Don’t stand too close to other visitors in the line. Keep 20cm away if you can.Follow the advice ……

’t eat during the show.Cafeterias will be quite busy. Do not stay too long after you finish eating...的). Everyone has to wait in line. Don’t stand too close to other visitors in the line. Keep 20cm away ……

on the train?A: Stay in your car on the train, don't walk around. Use your own cup when you drink. From... feel tired.How to stay healthy this spring IT seems that SARS isn't too bad this year. We don't need ……

sensitive. When you put cool things on these parts, you will feel cool more quickly.Don’t exercise too... it’s very hot outside, make sure you don’t exercise too much. ……

pets. They can be 6 to 12 cm long. They live for around 15 years. African clawed frogs always stay... frog 非洲爪蛙African clawed frogs are lovely pets. They can be 6 to 12 cm long. They live for around 15 ……

. But when it’s too dry, hot or cold, snails stay inside their shells (壳) for a long time... them slide (滑动) from place to place. But when it’s too dry, hot or cold, snails stay ……

fly south for winter. They fly a long way. They fly in groups.Make a changeSome animals don’t fly...Smart winter animalsWinter comes. It’s cold! We wear coats and hats. We stay in warm houses. We ……

boxing. However, no one knows if this is true. US people wear long johns too, but they’re not very... outdoors during winter. They need to wear long johns. Children also wear long johns to stay warm during ……

and leave again."I try to do it all in one trip so I don't have to always be running around and wasting gas... multiple (多个的) jobs. However, with the increase in gas prices, teenagers chose to stay at home ……

Dear Ralph,I'M just a freshman, but I feel that I don't want to grow up and face reality. I only want to live in my own world, with a carefree life without stress. When I think that people around me ……

’m awake, I just stay in my tree. I don’t like to go anywhere. I don’t eat very often. But once (一旦...懒懒的我Everyone says I’m a lazy girl. But don’t laugh at me. I’m a little sloth. I was born ……

. The bubbles are sealed (密封的) and don’t let air in. People cannot stay inside them too long.... The bubbles are sealed (密封的) and don’t let air in. People cannot stay inside them too long － only ……

非洲爪蛙 African clawed frogs are lovely pets. They can be 6-12cm long. They live for around 15 years.African clawed frogs always stay in water. These frogs don’t have tongues (舌头). They always use ……