Unit 6 When was it invented？ 同步练习（含答案）

Unit 6 When was it invented? Section B 同步练习 1．The apple is _____ (酸的)．I don't like it. 2．There are many _____ (顾客) in the shopping center.2·1·c·n·j·y 3．Please tell us the_____ (目的) about writing the book.【出处：21教育名师】 4．Many war _____ (英雄) are honored in the memorial hall.【版权所有：21教育】 5．The _____ (加拿大人) is a good people (民族)． 1. I need _____ (complete) the project. 2. They encourage us _____ (study) hard in the city. 21·cn·jy·com 3. he book has been _____ (translate) into many languages.21教育名师原创作品 4. The number of the books _____ (be) over 500,000.21*cnjy*com 5．I stop the child _____ (play) in the street. (　　)1.We are _____ into four teams to play the game.21*cnjy*com A．sorted B．made C．divided D．taken (　　)2.The wind stops them_____ playing badminton. A．to B．for C．from D．at (　　)3.The hero is _____ by the people in this country.21世纪教育网版权所有 A．looked to B．looked around C．looked up to D．looked up (　　)4.—How was the food in the town? —Terrible._____ we still had a good time there. A．Or B．So C．But D．Because (　　)5.I took her bag instead of mine _____. A．by mistakes B．by mistake C．with mistake D．with mistakes (　　)6.The soup is _____. A．salt enough B．enough salt C．salty enough D．enough salty (　　)7.We waited ages for a taxi.We gave up _____ and walked home. A．at the beginning B．in the end C．at first D．at least (　　)8.In our school library there _____ a number of books and the number of them _____ growing larger and larger.21教育网 A．is; are B．are; is C．has; is D．have; are (　　)9.I _____ stay up until 12：00 p.m. last night. A．is allowed to B．was allowed to C．allowed to D．was allowed (　　)10.We need some players for the game._____ you _____ your brother can join us. A．Not; but B．Neither; nor C．Either; or D．Not only; but also Man has invented four kinds of satellites (卫星)．The first kind of satellite studies the __1__ of the earth.They are used to make maps.They also help countries to see where they may __2__ oil or gold.2-1-c-n-j-y The second kind of satellite is used to guide ships and planes.A ship or a plane can __3__ a message to the satellite, and the satellite can find out __4__ the ship or the plane is. The third kind studies the weather.These satellites __5__ clouds and strong winds moving across the earth.They warn countries to make preparations (准备) when very __6__ weather is coming.__7__ kind is used for communication.Telephone calls __8__ countries can be sent by these satellites.Some can carry hundreds of calls at the same time.The call is sent to the satellite, then the __9__ sends it to a station in the country and this country is being phoned.These satellites also carry pictures; they can receive and send about eight __10__ at a time. (　　)1.A.biology B．history C．physics D．geography (　　)2.A.study B．find C．carry D．choose (　　)3.A.write B．send C．take D．bring (　　)4.A.where B．which C．what D．that (　　) ... ...