【正文】 50．This medicine _______ millions of people’s lives since it was put into use.A．is saving B．will save C．has saved D．had saved【答案】C【解析】句意：這種藥物自從投入使用以來已經(jīng)挽救了數(shù)百萬人的生命。根據(jù)twice可知此句是強(qiáng)調(diào)現(xiàn)在為止的生活經(jīng)歷，用現(xiàn)在完成時(shí)。你想跟我一起去看電影嗎？——不了，謝謝。但在含有時(shí)間狀語從句的主從復(fù)合句中要遵循主將從現(xiàn)的原則。 will startC．what time will Betty arrive。根據(jù)for two ，所以排除A；根據(jù)not onlybut also連接句子兩個(gè)主語時(shí)，謂語動(dòng)詞就進(jìn)原則；故選B47． Do you know ________ this afternoon? I39。根據(jù)句意we’re glad you have arrived可知，Larry現(xiàn)在已經(jīng)來了，因此打算開車去車站應(yīng)該是過去打算去做，但還沒有去做的事情，故應(yīng)選D。he為單數(shù)，所以謂語用第三人稱單數(shù)。42．My grandma _______ to the radio when I got home just now.A．listens B．listened C．is listening D．was listening【答案】D【解析】句意：我剛才到家的時(shí)候我的奶奶正在聽廣播。marry結(jié)婚，是短暫性動(dòng)詞，不可以持續(xù)，get married to ，排除A和D；be married to ，表示狀態(tài)，故答案為C。她正在廚房做飯。38．In the past few years, many schools ______ the ways of doing morning exercises.A．change B．changes C．will change D．have changed【答案】D【解析】試題分析：句意：在過去的幾年里，很多學(xué)校已改變了做早操的方式。37．—Do you think if Tom _____the work well tomorrow?—I think he will if he ______his best.A．does, will try B．will do, tries C．does, tries D．will do, will try【答案】B【解析】【詳解】句意：你認(rèn)為明天Tom是否會把工作做好？我認(rèn)為如果他盡他的最大努力，他會做好的。根據(jù)句意語境，本句用一般將來時(shí)。36．— Do you know _____ a wonderful match and two basketball matches on July 15 th ?— Yeah . I am going to watch them on that day.A．there will be B．there is going to have C．there are going to be D．is there going to be【答案】A【解析】【詳解】句意：——你知道7月15日會有一場精彩的比賽和兩場籃球賽嗎？——是的。35．Today’s young people can’t live without smart phones.Their eyes are glued to the screen wherever they go, even while they_____ meals.A．have B．a(chǎn)re having C．were having D．will have【答案】B【解析】【詳解】句意：——今天的年輕人離不開智能手機(jī)。go on 表示繼續(xù)的意思，而后一空will后接動(dòng)詞原形，故選D。A. is practising正在練習(xí)；單數(shù)； B. are practising正在練習(xí)，復(fù)數(shù)；C. will practise將去練習(xí)；一般將來時(shí)；D. would practise會去練習(xí)，過去將來時(shí)?？疾閯?dòng)詞時(shí)態(tài)辨析題。如for 和since 所引導(dǎo)的時(shí)間狀語都表示一段時(shí)間，那就要將瞬間動(dòng)詞轉(zhuǎn)化為表延續(xù)的動(dòng)詞或者表狀態(tài)的形式，be+名詞／形容詞或副詞／介詞短語等。marry和get married都是短暫性動(dòng)詞，不能與表示一段的時(shí)間狀語連用，marry的延續(xù)性形式為be married，故答案為B。by the time，直到……時(shí)候，指從過去某一點(diǎn)到從句所示的時(shí)間為止的一段時(shí)間，常與過去完成時(shí)連用。B.began動(dòng)詞plan用過去完成時(shí)來表示過去未曾實(shí)現(xiàn)的想法，希望，打算或意圖等。C.29．She ______ to go to school earlier, but she forgot to get up. A.has bookedhad booked動(dòng)詞hope用過去完成時(shí)來表示過去未曾實(shí)現(xiàn)的想法，希望，打算或意圖等。have hopedB.動(dòng)詞think用過去完成時(shí)來表示過去未曾實(shí)現(xiàn)的想法，希望，打算或意圖等。B.have thought掌握過去完成時(shí)的意義：表過去的過去；構(gòu)成：had+過去分詞。D.C.B.25．Rose and Minnie ________ each other pretty well before they worked in the same bank. A.【點(diǎn)評】英語中的時(shí)態(tài)主要是借助于時(shí)間狀語與上下文語境來進(jìn)行判斷。D.C.B.24．By the first day of August, 2007, the PLA ________ for eighty years.A.【答案】 C 【解析】【分析】had+動(dòng)詞的過去分詞構(gòu)成過去完成時(shí)，表示的過去的過去的時(shí)間點(diǎn)，本句中電影結(jié)束發(fā)生在我到達(dá)電影院之前，而到達(dá)電影院用的過去時(shí)，電影結(jié)束發(fā)生在過去的過去，所以用過去完成時(shí)。B.【點(diǎn)評】考查時(shí)態(tài)辨析23．——How was the movie you saw yesterday?——I have no idea. By the time I got to the movie theatre, the movie ______.A.t seen【答案】 D 【解析】【分析】 句意：昨天艾倫見到他的老朋友了嗎？——使得，他見到了。hasn39。B.22．—Did Alan see his old friends yesterday?—Yes, he did. HeD.have finishedhas, went【答案】 A 【解析】【分析】這題考查時(shí)