【正文】 在洗澡，強(qiáng)調(diào)動(dòng)作正在進(jìn)行，所以時(shí)態(tài)應(yīng)該用現(xiàn)在進(jìn)行時(shí)，結(jié)構(gòu)為：am/is/are + 動(dòng)詞的現(xiàn)在分詞，主語(yǔ)He為第三人稱單數(shù)，be動(dòng)詞用is?！炷?！太危險(xiǎn)了。根據(jù)“Xifeng Street is closed today”可知，今天工人正在維修，因此應(yīng)該使用現(xiàn)在進(jìn)行時(shí)。考查現(xiàn)在進(jìn)行時(shí)。考查句子時(shí)態(tài)?？疾闀r(shí)態(tài)。根據(jù)“now”可知，時(shí)態(tài)為現(xiàn)在進(jìn)行時(shí)，結(jié)構(gòu)為：am/is are doing，主語(yǔ)為She，be動(dòng)詞用is?？疾闀r(shí)態(tài)辨析。根據(jù)“Can you give me a hand?”和“Wait a moment.”可知解析：A【詳解】句意：——爸爸，我解不出這道數(shù)學(xué)題?！獙?duì)不起。根據(jù)上文“You look absentminded.”可知是詢問(wèn)現(xiàn)在做的事情，此句時(shí)態(tài)是現(xiàn)在進(jìn)行時(shí)?？疾榫渥拥臅r(shí)態(tài)?？疾闀r(shí)態(tài)。18．D【詳解】句意：——昨天我收到了安先生的來(lái)信。為什么不上車呢？——琳達(dá)還沒(méi)來(lái)。根據(jù)題干中“Where is he?”可知要回答現(xiàn)在在哪里，用現(xiàn)在進(jìn)行時(shí)表示“正在圖書館學(xué)習(xí)”，其結(jié)構(gòu)為be doing；主語(yǔ)“he”是第三人稱單數(shù)，be動(dòng)詞用is?？疾闀r(shí)態(tài)。考查時(shí)態(tài)。故選A。我真得要走了。我被告知（面試）結(jié)果將在兩天后知道?！獩](méi)問(wèn)題。根據(jù)句意“…before there is none l解析：B【詳解】句意：我的油快要用完了。根據(jù)“What are you up to”可知，答語(yǔ)要用現(xiàn)在進(jìn)行時(shí)，表示現(xiàn)在正在進(jìn)行的動(dòng)作，結(jié)構(gòu)為a解析：C【詳解】句意：——嗨，大明?？疾楝F(xiàn)在進(jìn)行時(shí)。故選B。考查現(xiàn)在進(jìn)行時(shí)。解析：C【詳解】句意：看，許多人在公園里跳舞。根據(jù)前句“The zoo keeper is worried”的語(yǔ)境可知，后句動(dòng)作應(yīng)是解析：C【詳解】句意：動(dòng)物園管理員很擔(dān)心，因?yàn)橛慰蛿?shù)量越來(lái)越少。根據(jù)語(yǔ)解析：B【詳解】句意：——我有幾天沒(méi)見(jiàn)到杰克了。我在做作業(yè)。 expect B．Are。t seen Jack for a couple of days. —He ________ for the English speaking petition which will take place next week.A．will prepare B．is preparing C．has prepared D．was preparing3．The zoo keeper is worried because the number of visitors ________ smaller and smaller.A．bee B．a(chǎn)re being C．is being D．have bee4．Look, many people ________ in the park.A．dance B．danced C．a(chǎn)re dancing D．will dance5．Listen! The boy ________ the piano again.A．plays B．played C．will play D．is playing6．—Hello, may I speak to Jim?—Sorry, he ________ an important meeting now.A．has B．is having C．will have D．was having7．—Tony, hurry up! We ________ for you now.—Just one minute.A．wait B．waited C．have waited D．a(chǎn)re waiting8．—Hi, Daming. What are you up to?—I ________ a project about family history.A．do B．did C．a(chǎn)m doing D．was doing9．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 out10．—Peter, please be quiet. Your brother ________ on the phone.—No problem.A．records B．recorded C．was recording D．is recording11．—John, how was your interview on Monday?—No idea. I for the result. I was told it would e in two days.A．wait B．waited C．will wait D．a(chǎn)m waiting12．Excuse me. I really need to go now. My children _____________for me at school.A．a(chǎn)re waiting B．waits C．wait D．waited13．— Lena, I guess you were in a hurry this morning. You ________ your sweater inside out.— Oh my god, I’ll have it changed immediately.A．wore B．a(chǎn)re wearing C．were wearing D．have worn14．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 off15．—I can39。 expect20．—Tom, please give me a hand in moving the piano. —Sorry. I ________ my car.A．repair B．repaired C．a(chǎn)m repairing D．have repaired21．— Dad, I can’t work out this math problem. Can you give me a hand?— Wait a moment. I ________ on the phone.A．a(chǎn)m talking B．will talk C．was talking D．have talked22．The students in our gr