1.众所周知，手机在我们的日常生活中起到了非常重要的作用。（play a part in）
2.小海过去常在做作业遇到难题时用手机上网找答案。（turn to）
3.他还热衷于网上聊天和玩网络游戏。（crazy）
4.他总是埋头看手机，以至于忽视了家人。（bury）
5.现在，他决心花更多时间陪伴家人，亲近大自然。（company）
All over the world, bus travel is one of the cheapest ways to get around. Taking a bus from country to country in between cities can be a money-friendly way to travel, but bus travel isn't popular. Unlike flying, bus travel is quite slow, and unlike train travel or renting a car and driving, buses can be uncomfortable. These are the reasons why many people won't choose bus travel.
Dinosaurs died out suddenly about 65 million years ago. Some scientists think it came after an unexpected incident when a huge rock from space hit the earth and put too much dust into the air. Others think the earth got too hot for the dinosaurs to live on any more. Nobody knows for sure why and how dinosaurs disappeared from the earth in such a short time.
Have you ever wanted to be part of a band as a famous singer or musician? Have you ever dreamed of playing in front of thousands of people at a concert, at which everyone is clapping and appreciating your music? Do you sing karaoke and pretend you are a famous singer like Song Zuying or Liu Huan? To be honest, a lot of people attach great importance to becoming rich and famous.
Water had also appeared on other planets like Mars but, unlike the earth, it had disappeared later. It was not immediately obvious that water was to be fundamental to the development of life. What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. This produced a chain reaction, which made it possible for life to develop.
Since the 1970s many new applications have been found for me. I have become very important in communication, finance and trade. I have also been put into robots and used to make mobile phones as well as help with medical operations. I have even been put into space rockets and sent to explore the Moon and Mars. Anyhow, my goal is to provide humans with a life of high quality. I am now truly filled with happiness that I am a devoted friend and helper of the human race!
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As for virtual reality, concerned critics have warned that there could be dangers in this powerful new medium. Will we have VR games in which people can commit virtual crimes（犯罪）? After people get used to VR, will they want to return to reality? Will we forget how to live and work with real people? On the other hand, some people think that VR will help us improve the world. By experimenting harmlessly inside a VR world, we will be able to see the dangers we may face in the future. Then we will be able to avoid them in real life.
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Geography plays a part in making dialects. Some people who live in the mountains of the eastern USA speak with an older kind of English dialect. When Americans moved from one place to another, they took their dialects with them. So people from the mountains in the southeastern USA speak with almost the same dialect as people in the northwestern USA. The USA is a large country in which many different dialects are spoken. Although many Americans move a lot, they still recognize and understand each other's dialects.
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