【正文】 as soon as引導(dǎo)的從句用一般現(xiàn)在時(shí)，主句用一般將來(lái)時(shí)，即“主將從現(xiàn)”原則，故選C。 will ring【答案】C【解析】【詳解】句意“鈴聲一響，你必須上交你的試卷”。 will ringC．be handed in。50．Your paper must _______ as soon as the bell _______.A．hand in?？疾閯?dòng)詞時(shí)態(tài)辨析題。49．— Father’s day is ing. Have you prepared any presents for your father?— Not yet, but I’m sure I ______ one for him.A．bought B．buy C．have bought D．will buy【答案】D【解析】句意：——父親節(jié)就要到了。in ten months十個(gè)月后，用于一般將來(lái)時(shí)。到時(shí)候見(jiàn)?？键c(diǎn)：考查動(dòng)詞時(shí)態(tài)。沒(méi)關(guān)系，如果明天你不能去看電影，我就邀請(qǐng)我的朋友和我一起去。 ask D．won’t。 will ask B．won’t。since the first pioneers arrived in America自從第一批開(kāi)拓者來(lái)到美國(guó)，這個(gè)是一段時(shí)間，用于現(xiàn)在完成時(shí)態(tài)，we是復(fù)數(shù)人稱，需用“have+過(guò)去分詞”結(jié)構(gòu)；根據(jù)句意語(yǔ)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(kāi)拓者來(lái)到美國(guó)，我們就慶祝這個(gè)節(jié)日?！军c(diǎn)睛】現(xiàn)在完成時(shí)的標(biāo)志詞already（肯定）, yet（否定，疑問(wèn)）, just, before, recently, still, lately, never, ever, never, twice, on several occasion, in the past few days/weeks/months/years,（up to）these few days/weeks/months/years, this morning/week/month/year, just, up to present, so far, up to now, till now, since+時(shí)間45．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(tīng)廣播。考查主謂一致和現(xiàn)在完成時(shí)。have hadboughtfor 10 years。10 years ago.=His father has如：His father所以選A。她離開(kāi)了大約2個(gè)小時(shí)。故選A。as soon as“一……就……”，引導(dǎo)的時(shí)間狀語(yǔ)從句，用一般現(xiàn)在時(shí)，主句用一般將來(lái)時(shí)。故選D。根據(jù)tomorrow可知，句子應(yīng)該用一般將來(lái)時(shí)。41．—Tomorrow my dad a big dinner for my birthday party.—Sounds great!Have a good time.A．cooks B．was cooking C．cooked D．will cook【答案】D【解析】【詳解】句意：明天我爸爸要為我的生日聚會(huì)做一頓大餐。 第二個(gè)空表示“the car”被生產(chǎn)，且動(dòng)作發(fā)生在2013年，故填was produced。40．The factory over 1200 cars a month. My car in it in 2013.A．produces,was produced B．was produced,producesC．produces,produces D．was produced,produced【答案】A【解析】【詳解】句意：這個(gè)工廠每個(gè)月生產(chǎn)1200多輛車，我的車就是2013年在這里生產(chǎn)的。Jack Johnson has gone to London. ?？傊?，說(shuō)話時(shí)該人不在現(xiàn)場(chǎng)，一般不用第一、第二人稱代詞作句子的主語(yǔ)?？膳cjust, ever, never等連用，例如： I have just been to the post office. 我剛才去郵局了。例如：Mr. Brown has been in Shanghai for three days. 布朗先生來(lái)上海已經(jīng)有三天了。since yesterday morning自昨天早晨以來(lái)，表示的是截止到目前為止的時(shí)間段，用于現(xiàn)在完成時(shí)態(tài)，排除A；arrived為短暫性動(dòng)詞，不能與表示一段的時(shí)間狀語(yǔ)連用；have been to表示某人去過(guò)某地，也不能與表示一段的時(shí)間狀語(yǔ)連用，故答案為C。這是賓語(yǔ)從句，主句是一般現(xiàn)在時(shí)態(tài)，從句根據(jù)句意應(yīng)用一般將來(lái)時(shí)態(tài)；故選C39．Has your cousin arrived in Beijing yet?Yes. She Beijing since yesterday morning.A．a(chǎn)rrived in B．has arrived in C．has been in D．has been to【答案】C【解析】句意：你表弟到北京了嗎？是的。故選：A。A. has changed現(xiàn)在完成時(shí)態(tài)，已改變；B. changes一般現(xiàn)在時(shí)態(tài)的動(dòng)詞三單形式，改變；C. will change一般將來(lái)時(shí)態(tài)，將會(huì)改變；D. change動(dòng)詞原形，改變?？键c(diǎn)：考查時(shí)態(tài)的用法。根據(jù)賓語(yǔ)從句是what was happening可知此處用過(guò)去時(shí)，故排除D項(xiàng)。 repairing【答案】D【解析】句意：四分之三的路已經(jīng)壞掉了，它需要被修理。 to be repairedD．Three quarters。 to repairC．Threefourth。 repairedB．Three quarters。35．________ of the road ________ broken down． It needs ________．A．Threefourths。A. left一般過(guò)去時(shí)；B. leave一般現(xiàn)在時(shí)；C. will leave一般將來(lái)時(shí)；D. has left現(xiàn)在完成時(shí)。34．The train in an hour. I must go to the train station right now.A．left B．leaveC．will leave D．has left【答案】C【解析】【詳解】句意：火車一小時(shí)后出發(fā)。根據(jù)謂語(yǔ)are可知此處用一般現(xiàn)在時(shí)，故排除CD兩項(xiàng)。33．—There are so many swimmers swimming in the swimming pool. —Yes, and sixty percent _