【正文】 ______ happily in the tree outside the window.A．sing B．sang C．a(chǎn)re singing D．were singing7．The noise es from the boys. They _______ a party.A．have B．a(chǎn)re having C．will have D．have had8．—Where is John?—He is in the kitchen. He ________ the dishes now.A．will wash B．is washing C．washes D．washed9．—Jack, can you lend me your camera?—Sorry, I________ it. I will give it to you later.A．used B．a(chǎn)m using C．have used D．was using10．—Hi, Daming. What are you up to?—I ________ a project about family history.A．do B．did C．a(chǎn)m doing D．was doing11．My oil ________. I must go to the gas station before there is none left.A．has run out B．is running out C．has been run out D．is being run out12．—Peter, please be quiet. Your brother ________ on the phone.—No problem.A．records B．recorded C．was recording D．is recording13．Ladies and gentlemen, please remain in your seats, fasten your seat belt and bring your seat back. The plane________.A．takes off B．is taking off C．has taken off D．took off14．—Yesterday I received a letter from .—You did? I hear he________for America next year.A．has left B．leaves C．left D．is leaving15．— Hurry up, Mary. The movie has already been on for ten minutes. —Wait a moment. I ________ some snacks in a shop.A．buy B．bought C．a(chǎn)m buying D．have bought16．—I _____to Beijing tomorrow. —Have a good trip!A．flies B．fly C．a(chǎn)m flying D．flew17．—Tom, where39。s dad?—Oh, he ________ the flowers in the garden.A．waters B．is watering C．watered D．has watered18．—You look absentminded. ________you ________someone?—Yes. An old friend of mine is ing. We haven39。 expecting D．Did。根據(jù)“Let’s go and help her”可知，此處指讓我們?nèi)椭谧鐾盹埖哪棠?，故為現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)為am/is/a解析：A【詳解】句意：奶奶正在做晚飯。故選A?？疾閯?dòng)詞時(shí)態(tài)?？疾閯?dòng)詞時(shí)態(tài)。主語(yǔ)是she，be動(dòng)詞用is。根據(jù)“Look”可知現(xiàn)在正在跳舞，用現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)為be doing。根據(jù)“Look”可知現(xiàn)在正在跳舞，用現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)為be doing。根據(jù)前面的“One moment!”可知，判斷設(shè)空處的動(dòng)作“發(fā)送電子郵件”在說(shuō)話時(shí)刻正在進(jìn)行著，所以用解析：A【詳解】句意：——你好！我可以和湯姆講話嗎？——等一下，他正在發(fā)電子郵件。她正在打掃教室?？疾楝F(xiàn)在進(jìn)行時(shí)?？疾楝F(xiàn)在進(jìn)行時(shí)。7．B【詳解】句意：噪音來(lái)自那群男孩。他們正在開(kāi)派對(duì)。8．B【詳解】句意：——約翰在哪里？——他在廚房里。他正在洗碗。故選B。根據(jù)“Sorry...”及“I will give it to you later.”可知，抱解析：B【詳解】句意：——杰克，你能把你的照相機(jī)借給我嗎？——抱歉，我正在用。由此可推斷我正在用，稍后借給你，符合語(yǔ)境。你在忙什么？——我正在做一個(gè)關(guān)于家族史的項(xiàng)目?？疾閯?dòng)詞時(shí)態(tài)?？疾閯?dòng)詞時(shí)態(tài)。考查動(dòng)詞時(shí)態(tài)。12．D【詳解】句意：——彼得，請(qǐng)安靜。根據(jù)“Peter, please be quiet.”可知，現(xiàn)在要保持安靜，此處表示你哥哥現(xiàn)在正在錄音，因此用現(xiàn)在解析：D【詳解】句意：——彼得，請(qǐng)安靜。根據(jù)“Peter, please be quiet.”可知，現(xiàn)在要保持安靜，此處表示你哥哥現(xiàn)在正在錄音，因此用現(xiàn)在進(jìn)行時(shí)am/is/are+doing結(jié)構(gòu)，故選D。takes off動(dòng)詞三單；is taking off現(xiàn)在進(jìn)行時(shí)；has taken of解析：B【詳解】句意：女士們，先生們，請(qǐng)留在座位上，系好安全帶，請(qǐng)將座椅靠背調(diào)整好。14．D【詳解】句意：——昨天我收到了安先生的來(lái)信。謂語(yǔ)動(dòng)詞leave是位移動(dòng)詞，用進(jìn)行時(shí)表示將來(lái)?？疾闀r(shí)態(tài)。15．C【詳解】句意：——快點(diǎn)，瑪麗，電影已經(jīng)開(kāi)始十分鐘了。buy一般現(xiàn)在時(shí)；bought一般過(guò)去時(shí)；am buying現(xiàn)在進(jìn)行時(shí)；have boug解析：C【詳解】句意：——快點(diǎn)，瑪麗，電影已經(jīng)開(kāi)始十分鐘了。buy一般現(xiàn)在時(shí)；bought一般過(guò)去時(shí)；am buying現(xiàn)在進(jìn)行時(shí)；have bought現(xiàn)在完成時(shí)?！Ｄ懵猛居淇臁！Ｄ懵猛居淇?。flies是fly的第三人稱(chēng)單數(shù)形式；fly是動(dòng)詞原形；flew是fly的過(guò)去式。waters一般現(xiàn)在時(shí)；is watering現(xiàn)在進(jìn)行時(shí)；watered一般過(guò)去時(shí)；has watered現(xiàn)解析：B【詳解】句意：——湯姆，爸爸在哪兒？ ——喔，他正在花園里的澆花。s dad?”可知，答語(yǔ)“他在澆花”應(yīng)是現(xiàn)在進(jìn)行時(shí)。我的一個(gè)老朋友要來(lái)了。根據(jù)上文“解析：B【詳解】句意：——你看起來(lái)心不在焉?？疾榫渥拥臅r(shí)態(tài)。故選B。故選B。故選B。now現(xiàn)在，是現(xiàn)在進(jìn)行時(shí)的標(biāo)志，需用be doing結(jié)構(gòu)；主語(yǔ)students復(fù)數(shù)人稱(chēng)，be動(dòng)詞用are，故選C。now現(xiàn)在，是現(xiàn)在進(jìn)行時(shí)的標(biāo)志，需用be doing結(jié)構(gòu)；主語(yǔ)s