【文章內(nèi)容簡(jiǎn)介】 B. though C. but D. so【解析】選D。作者認(rèn)為自己所做的對(duì)每個(gè)人都有好處, 所以(so)不久會(huì)再做一次。Ⅲ. 語(yǔ)法填空　　Rome wasn’t built in a day. Nearly two decades have passed since China launched the first Beidou satellite in 2000. Since then, more Beidou satellites have been sent into orbit, 1. __________(form) the Beidou Navigation Satellite System (BDS). In late 2012, BDS 2. __________(begin) providing services to people in China and other parts of the AsiaPacific region. At the end of 2018, it started to provide global services. Now with two more Beidou satellites 3. (launch) on Dec. 16, 2019, BDS has 53 satellites in orbit. It 4. __________(expect) to greatly improve the system’s ability to serve 5. __________(user) worldwide. Although a satellitebased navigation system needs only 24 satellites to run 6. __________(proper), having 53 allows for better coverage. This is 7. __________it works: a signal receiver on Earth measures its distance from at least three satellites by recording the amount of time it takes 8. __________(receive) their signals. Then it can calculate its location. With so many satellites, BDS can provide 9. __________more accurate calculation. While GPS provides meterlevel positioning accuracy, BDS reduces the error 10. centimeters. This service is especially useful for land surveying, mapping, agriculture and automated driving. Future plans call for a smarter and more accessible system with Beidou at its core, to e online by 2035. By then, we can probably say that Rome has finally been built. 【文章大意】這是一篇說(shuō)明文。文章主要介紹了我國(guó)自主研發(fā)的北斗定位系統(tǒng), 包括其發(fā)展、作用、運(yùn)行模式、優(yōu)勢(shì)等。1. 【解析】forming?？疾榉侵^語(yǔ)動(dòng)詞。分析句子成分和句子結(jié)構(gòu)可知, 句中已有謂語(yǔ)動(dòng)詞have been sent, 無(wú)連詞, 可推斷這是一個(gè)簡(jiǎn)單句, 所以設(shè)空處用作非謂語(yǔ)動(dòng)詞, 在句中充當(dāng)狀語(yǔ)。設(shè)空處與邏輯主語(yǔ)Beidou satellites之間是主動(dòng)關(guān)系, 所以要用現(xiàn)在分詞。故填forming。2. 【解析】began。考查謂語(yǔ)動(dòng)詞時(shí)態(tài)。分析句子成分可知, 句中缺少謂語(yǔ)動(dòng)詞, 可推斷設(shè)空處充當(dāng)謂語(yǔ)。根據(jù)時(shí)間狀語(yǔ)In late 2012可知, 應(yīng)該用一般過(guò)去時(shí)。故填began。3. 【解析】launched?？疾榉侵^語(yǔ)動(dòng)詞。分析句子成分和句子結(jié)構(gòu)可知, 句中已有謂語(yǔ)動(dòng)詞has, 無(wú)連詞, 可推斷這是一個(gè)簡(jiǎn)單句, 所以設(shè)空處用作非謂語(yǔ)動(dòng)詞, 在句中充當(dāng)賓語(yǔ)補(bǔ)足語(yǔ)。設(shè)空處與邏輯主語(yǔ)Beidou satellites之間是被動(dòng)關(guān)系, 所以要用過(guò)去分詞。故填launched。4. 【解析】is expected?？疾楸粍?dòng)語(yǔ)態(tài)。分析句子成分可知, 句子缺少謂語(yǔ)動(dòng)詞, 可推斷設(shè)空處充當(dāng)謂語(yǔ)。結(jié)合文章時(shí)態(tài)可知, 應(yīng)該用一般現(xiàn)在時(shí)。主語(yǔ)it指的是BDS, 與expect之間是被動(dòng)關(guān)系, 所以要用一般現(xiàn)在時(shí)的被動(dòng)語(yǔ)態(tài)。故填is expected。5. 【解析】users?？疾槊~復(fù)數(shù)。設(shè)空處位于不定式to serve后面, 充當(dāng)賓語(yǔ), 且此處指的是全世界的用戶(hù), 所以應(yīng)該用復(fù)數(shù)形式, 泛指多個(gè)用戶(hù)。故填users。6. 【解析】properly。考查副詞。設(shè)空處位于非謂語(yǔ)動(dòng)詞to run后面, 起修飾作用, 修飾動(dòng)詞要用副詞形式。故填properly。7. 【解析】how?？疾楸碚Z(yǔ)從句連接詞。句意: 這是它如何運(yùn)作的(模式)。分析句子成分和結(jié)構(gòu)可知, 句中有系動(dòng)詞is和謂語(yǔ)動(dòng)詞works, 可推斷含有兩個(gè)句子, 所以設(shè)空處需要填入連接詞。從句位于is后面, 是表語(yǔ)從句。根據(jù)后文的描述可知, 這里說(shuō)明的是運(yùn)行模式, 即如何運(yùn)行, 所以要用連接副詞how。8. 【解析】to receive?？疾楣潭ň湫?。分析句子“a signal receiver on Earth measures its distance from at least three satellites by recording the amount of time it takes_______(receive) their signals”可知, 句中含有省略關(guān)系詞that/which的定語(yǔ)從句it takes_______(receive) their signals, 修飾先行詞time。關(guān)系詞在從句中代替time充當(dāng)takes的賓語(yǔ), 此處考查固定句型it takes time to do sth. , 意為“做某事花費(fèi)多少時(shí)間”。故填to receive。9. 【解析】a?？疾楣谠~。句意: 因?yàn)橛羞@么多的衛(wèi)星, BDS可以提供一種更精確的計(jì)算結(jié)果。calculation在句中意為計(jì)算結(jié)果, 是可數(shù)名詞, 前面沒(méi)有限定詞, 無(wú)特指, 需要填不定冠詞。more發(fā)音的第一個(gè)音素為輔音音素。故填a。10. 【解析】to。考查介詞。句意: 盡管GPS提供到米的定位精確度, 但是BDS把誤差減少到了厘米。根據(jù)句意可知, 此處考查固定表達(dá)reduce. . . to意為“減少到……”。故填to。閱讀理解ARobert Jarvik, born on May 11, 1946 in Michigan and raised in Stamford, is a medical scientist and researcher, who played an important role in the invention of the artificial heart. He was interested in medicine from a young age. He watched his father perform operations and gained a patent (專(zhuān)利權(quán)) for a machine applied in the medical operation before he graduated from high school. Jarvik attended Syracuse University and considered a career in art. When his father developed heart disease suddenly, he decided then to work on a medical career. He applied to medical schools, but was not admitted to any schools in the US. Before long, he was admitted to the medical school in Italy and stayed there for two years. He returned to get a degree in medicine from New York University in 1971. After working for a period o