One Sunday morning in August I went to a local music festival. I left it early because I had an appointment ①(late) that day. My friends walked me to the bus stop and waited with me ② the bus arrived. I got on the bus and found a seat near the back, and then I noticed a man ③(sit) at the front. He ④ (pretend) that a tiger toy was real and giving it a voice. He must be ⑤ (mental) disabled.
Behind him were other people to ⑥ he was trying to talk, but after some minutes ⑦ walked away and sat near me, looking annoyed.I didn’t want to be laughed at for talking to him but I didn’t like leaving him ⑧ his own either.After a while I rose from my seat and walked to the front of the bus. I sat next to the man and introduced myself. We had ⑨ amazing conversation. He got off the bus before me and I felt very happy the rest of the way home.I’m glad I made the choice. It made ⑩ of us feel good.
Everyone needs to know how to prevent a fire. It is also important to know what to do when it ① (break)out.
Every year, over 11,000 people ② (kill)or injured in house fires. These fires could have been avoided. Smokers who are ③ (care)cause about 200 deaths and over 6,000 fires .More than of those ④ die in fires are poisoned or harmed by smoke.
If fire happens, do not attempt to fight the fire unless it is small. Try putting out a small fire with water. If ⑤ fire has spread or if the flames are more than 20 inches high, shut the door on it. Warn everyone else in the building and tell them to get out. You should leave and dial 911 for the fire department.
Before ⑥ (go)into a room, check the door. If the handle or the door is hot, do not open it! Instead, put clothing or a wet towel at the bottom of it to keep smoke out. If the door is not hot, open it ⑦ (slow).If there is a rush of smoke heat, close it again and shout to warn ⑧(other)inside.
Now open the window and shout “Fire!”.See whether you can drop safely to the ground. Use this ⑨ your escape course if you can. If you are not on ground level, break your fall by pushing a mat out first. Lower yourself at arm’s ⑩ (long) before dropping. Once outside, stay out outside and make sure the fire department is called.
Many teachers believe that hands-on experience is the ① (good) way to learn. A group of students in the United States are putting that belief to the test. They ② (success) designed and built a robot for discovering unexplored mines ③ the bottom of the sea. Students made the robot ④ (answer) a challenge from the U.S. Department of Defense.
The students recently tested the underwater vehicle ⑤ (call) Perseus Ⅱ in a 95-meter-long tank of water at the Stevens Institute of Technology.
The robot costs about $15,000 to build. The students use a video game control to direct ⑥ (it) movements in the tank. What’s more, devices known as Japters ⑦ (able) the robot to go up, down and toward its target in the water. Video cameras on the robot send images back to a computer through a 13-meter-long cable. Perseus Ⅱ also has ⑧ set of lasers (激光),which are used to measure the size of an object.
The robot is the creation of five undergraduate students. For over six months, they worked up ⑨ 20 hours a week to design and build Perseus Ⅱ.
DeLorme supervised the project from ⑩ (begin) to end. He says the specialized requirements of robots were demanding.