【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。這里是there be句型，不能出現(xiàn)have/has，排除BD；根據(jù)時間狀語tomorrow ，其結(jié)構(gòu)是there will be+主語+介詞短語。49．There a basketball game between Class 8 and Class 12 tomorrow afternoon.A．is B．has C．will be D．will have【答案】C【解析】【詳解】句意：明天下午在8班和12班之間將有一場籃球比賽?！驹斀狻吭囶}分析：句意：——哎吆！停電啦！——對不起，我不知道你在使用洗衣機(jī)。所以該句強(qiáng)調(diào)的是過去某個時間正在進(jìn)行和發(fā)生的動作，確定時態(tài)為過去進(jìn)行時態(tài)，其構(gòu)成為was/were＋現(xiàn)在分詞，根據(jù)主語是I，故助動詞用was，watch的現(xiàn)在分詞為watching，故填was watching，故答案選A。根據(jù)句意“——湯姆，你剛才聽到有人敲門了嗎？——沒有，我和我的朋友正在臥室里看電視?？疾檫^去進(jìn)行時。since the first pioneers arrived in America自從第一批開拓者來到美國，這個是一段時間，用于現(xiàn)在完成時態(tài)，we是復(fù)數(shù)人稱，需用“have+過去分詞”結(jié)構(gòu)；根據(jù)句意語境，可知選D。46．We _____ the festival since the first pioneers arrived in America.A．celebrates B．celebratingC．celebrated D．have celebrated【答案】D【解析】句意：自從第一批開拓者來到美國，我們就慶祝這個節(jié)日。listen和look等用于提醒，后面的句子多用現(xiàn)在進(jìn)行時態(tài)，可排除前三項(xiàng)。45．Listen, someone ______ in the room.A．was singing B．sang C．sings D．is singing【答案】D【解析】【詳解】句意：聽，有人在房間里唱歌。根據(jù)時間狀語從句before she got ，所以選C。44．— What do you think of the young lady?— She is hardworking. She ________ all her effort into her work before she got ill.A．has put B．put C．had put D．would put【答案】C【解析】試題分析：句意：你認(rèn)為這位小姐怎樣？她很勤奮。表示過去發(fā)生或已經(jīng)完成的某一動作對現(xiàn)在造成的影響或結(jié)果。43．I don39。B選項(xiàng)是一般過去時；C選項(xiàng)是現(xiàn)在進(jìn)行時；D選項(xiàng)是一般將來時。have supper是一個固定的短語，意思是吃晚飯?？键c(diǎn)：考查動詞的時態(tài)。41．— What were you doing when we were playing basketball yesterday afternoon?— I ______ the classroom.A．was cleaning B．have cleanedC．will clean D．clean【答案】A【解析】試題分析：句意：昨天下午當(dāng)我們正在打籃球時，你正在做什么？結(jié)合語境可知下文描述的是過去某時正在進(jìn)行的動作，故用過去進(jìn)行時態(tài)。——但是沒有人知道明天會不會下雨。 rains. D．won’t rain。 rains B．doesn’t rain。39．—Shall we play tennis now?—Sorry, I can’t. I my homework.A．do B．did C．have done D．a(chǎn)m doing【答案】D【解析】句意：——我們現(xiàn)在打網(wǎng)球去好嗎？——對不起，我不能去，我在做作業(yè)。第二空根據(jù)for 3 years可知此處用延續(xù)性動詞的現(xiàn)在完成時，故用have been?！驹斀狻縥oin加入，是瞬間性動詞；be in參加，是延續(xù)性動詞。38．—Are you a basketball player in you school? —Yes, I______the team 3 years it for 3 years.A．joined, was B．was joined, amC．have joined,have been D．joined, have been【答案】D【解析】【分析】句意：——你在你們學(xué)校是一名籃球運(yùn)動員嗎？——是的，我在3年前加入了籃球隊(duì)?？疾楝F(xiàn)在進(jìn)行時。綜合以上，可知選A。there be 結(jié)構(gòu)的一般將來時用there will be 和there is going to be，表示最近要做的事，可排除B。賓語從句需用陳述句語序，D是疑問句語序，可排除。那天我要去看它們。35．It is still unknown how AI（人工智能） the way of our life as well as the world.A．change B．changed C．will change D．was changing【答案】C【解析】句意：仍然不知道人工智能將會怎么改變我們的生活方式還有世界?？疾橐话氵^去時。the English role play for the show last night.A．will practice B．practiced C．is34．They從第二個人說的last Friday是過去的時間可知，第二空用一般過去時；結(jié)合語境可知第一空是問是否曾經(jīng)看過電影，用現(xiàn)在完成時。我上個星期五看的。33．—______you ______Wolf Warrior II（戰(zhàn)狼2）? —Yes. I ______it last Friday. Kung fu artist Wu Jing both starred in and directed this action movie.A．Have, seen, have seen B．Did, see, sawC．Have, seen, saw D．Did, see, have