Unit 4 Amazing Science Topic 1仁爱版九年级上册课时优化训练（含解析）

Unit 4 Amazing Science 1. When was it invented —九年级英语仁爱版上册课时优化训练 一、单选题 1.After three spirits visited Scrooge, the old man _____ realize the importance of living with a grateful heart. A.made to B.was made to C.was made D.made 2.—What’s the _____ of your great success —Believe in yourself and stick to what you’re doing. A.problem B.pleasure C.method D.chance 3.Scientists found that dogs may know human's feelings by _____ our breath and sweat (汗). A. tasting B. smelling C. touching D. watching 4.Not only Lin Tao but also Wang Hai _____ by the teacher. They did very well in English exam. A. praised B. are praised C. is praised D. was praised 5.No one knows what life will be like in the future, but you can use your _____ to make a picture in your mind. A.knowledge B.invention C.courage D.imagination 6.We can overcome any difficulties _____ we believe in ourselves. A. as well as B. as far as C. as long as D. as often as 7.—How did ancient people find out where they were —Stars _____ the guiding marks. A. are used by B. were used as C. used as D. were used by 8.—How do you _____ the idea of your invention —When I saw a boy play on the seesaw(跷跷板), the idea occur to me. A. come about B. come to C. come out D. come up 9.—Why didn't you play basketball with us yesterday afternoon —Because I _____. I had to look after my little sister. A. didn't allow to come out B. don't allow to come out C. wasn't allowed to come out D. am not allowed coming out 10.It is said that the _____ was _____ by that _____ many years ago. A. invention; inventor; inventing B. inventor; invention; invented C. invention; invented; inventor D. inventing; invented; invention 二、阅读理解 Because of a lack of trained lifeguards to watch over swimming pools, a team of scientists from Germany has developed an underwater robot to help lifeguards in rescuing (救援) swimmers in emergencies. According to scientists, there are some typical postures that you can use to recognize when someone is in danger. The robot has been tested in a variety of settings including indoor pools and open water. If swimmers’ movements are consistent with drowning (溺亡), the information of the drowning person will be sent out, which is stored in a docking station on the pool floor, and it will be released by a signal from the monitoring cameras. Once the robot receives the signal and reaches its destination, it will carry the endangered person to the surface. What’s more, the robot is designed with a set of moving parts to keep the lifeless person from sliding down as the robot surfaces. When the robot is tested at lakes and other outdoor settings, drones (无人机) took on the task of the monitoring cameras. For rescues in swimming lakes where the visibility is limited, the underwater vehicle must be equipped with acoustic sensors (声音传感器). Sound wave echoes can be used to determine people’s positions so precisely that the robot can autonomously head for the target perso ... ...