【正文】 在洗澡，強調(diào)動作正在進(jìn)行，所以時態(tài)應(yīng)該用現(xiàn)在進(jìn)行時，結(jié)構(gòu)為：am/is/are + 動詞的現(xiàn)在分詞，主語He為第三人稱單數(shù)，be動詞用is?！炷?！太危險了。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。考查現(xiàn)在進(jìn)行時?？疾榫渥訒r態(tài)?？疾闀r態(tài)。根據(jù)“now”可知，時態(tài)為現(xiàn)在進(jìn)行時，結(jié)構(gòu)為：am/is are doing，主語為She，be動詞用is?？疾闀r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。——對不起。根據(jù)上文“You look absentminded.”可知是詢問現(xiàn)在做的事情，此句時態(tài)是現(xiàn)在進(jìn)行時?？疾榫渥拥臅r態(tài)?？疾闀r態(tài)。18．D【詳解】句意：——昨天我收到了安先生的來信。為什么不上車呢？——琳達(dá)還沒來。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)行時表示“正在圖書館學(xué)習(xí)”，其結(jié)構(gòu)為be doing；主語“he”是第三人稱單數(shù)，be動詞用is?？疾闀r態(tài)?？疾闀r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]問題。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，答語要用現(xiàn)在進(jìn)行時，表示現(xiàn)在正在進(jìn)行的動作，結(jié)構(gòu)為a解析：C【詳解】句意：——嗨，大明。考查現(xiàn)在進(jìn)行時。故選B。考查現(xiàn)在進(jìn)行時。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”的語境可知，后句動作應(yīng)是解析：C【詳解】句意：動物園管理員很擔(dān)心，因為游客數(shù)量越來越少。根據(jù)語解析：B【詳解】句意：——我有幾天沒見到杰克了。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