【正文】 f現(xiàn)在完成時(shí)；took off一般過(guò)去時(shí)；根據(jù)“Ladies and gentlemen, please remain in your seats, fasten your seat belt and bring your seat back.”可知是飛機(jī)起飛前，讓乘客準(zhǔn)備的內(nèi)容，可推測(cè)出此處是用現(xiàn)在進(jìn)行時(shí)表將來(lái)，故選B。飛機(jī)正在起飛。考查時(shí)態(tài)。13．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。wear穿；根據(jù)“I’ll have it changed immediately”可知在說(shuō)話的時(shí)候“毛衣穿反”這個(gè)動(dòng)作正在進(jìn)行，用現(xiàn)在進(jìn)行時(shí)，結(jié)構(gòu)是：am/is/are + doing；主語(yǔ)是“You”，be動(dòng)詞用are?！?，天吶！我馬上把它換過(guò)來(lái)。wear穿；根據(jù)“I’ll have it changed immediately解析：B【詳解】句意：——Lena，我想今天早上你很匆忙?！?，天吶！我馬上把它換過(guò)來(lái)。12．B【詳解】句意：——Lena，我想今天早上你很匆忙?！罢谟谩睍r(shí)態(tài)是現(xiàn)在進(jìn)行時(shí)。根據(jù)“Sorry...”及“I will give it to you later.”可知，抱歉，我稍后給你。我稍后給你?？疾閯?dòng)詞時(shí)態(tài)。11．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。look“看”用于提醒，后面的句子需用現(xiàn)在進(jìn)行時(shí)“be doing”結(jié)構(gòu)。touch摸，主語(yǔ)they是復(fù)數(shù)人稱(chēng)，解析：D【詳解】句意：——軍官們?cè)谀膬?？——瞧！他們正在宮殿里摸象?？疾閯?dòng)詞時(shí)態(tài)辨析。故選C?？疾閯?dòng)詞時(shí)態(tài)和the number of的用法?？疾閯?dòng)詞時(shí)態(tài)和the number of的用法。故選C。根據(jù)語(yǔ)境及“at the moment”可知，打來(lái)電話的時(shí)候，布朗先生正在開(kāi)會(huì)，時(shí)態(tài)用現(xiàn)在進(jìn)行時(shí)，結(jié)構(gòu)為am/is/are doing。根據(jù)語(yǔ)境及“at the moment”可知，打來(lái)電話的時(shí)候，布朗先生正在開(kāi)會(huì)，時(shí)態(tài)用現(xiàn)解析：C【詳解】句意：——我能和布朗先生通電話嗎？——很抱歉，他現(xiàn)在正在辦公室召開(kāi)重要的會(huì)議。8．C【詳解】句意：——我能和布朗先生通電話嗎？——很抱歉，他現(xiàn)在正在辦公室召開(kāi)重要的會(huì)議。考查現(xiàn)在進(jìn)行時(shí)。根據(jù)“Tony, hurry up! We…for you now.”可知，此處強(qiáng)調(diào)動(dòng)作正在發(fā)生，用現(xiàn)在進(jìn)行時(shí)，故選解析：D【詳解】句意：——托尼，快點(diǎn)！我們現(xiàn)在在等你?！@就來(lái)。故選D?？疾閯?dòng)詞時(shí)態(tài)?？疾閯?dòng)詞時(shí)態(tài)。故選B。根據(jù)“now”可知要用現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)為be doing。解析：B【詳解】句意：——你好，我可以和吉姆講話嗎？——對(duì)不起，他正在開(kāi)一個(gè)重要的會(huì)。主語(yǔ)he后接be動(dòng)詞is?？疾楝F(xiàn)在進(jìn)行時(shí)。故選C。考查現(xiàn)在進(jìn)行時(shí)的用法?？疾楝F(xiàn)在進(jìn)行時(shí)的用法。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，所以用現(xiàn)在進(jìn)行時(shí)；現(xiàn)在進(jìn)行時(shí)的構(gòu)成是：主語(yǔ)+am/is/are+動(dòng)詞的現(xiàn)在分詞；主語(yǔ)是He，be動(dòng)詞用is，send的現(xiàn)在分詞是sending；故選A。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。3．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。主語(yǔ)是she，be動(dòng)詞用is。根據(jù)上文“Hello. May I speak to Laura, please?”及下文“Sorry, she39。考查動(dòng)詞時(shí)態(tài)。我可以和勞拉講話嗎？——對(duì)不起，她不在家?？疾閯?dòng)詞時(shí)態(tài)。我可以和勞拉講話嗎？——對(duì)不起，她不在家。故選C?？疾閯?dòng)詞時(shí)態(tài)。故解析：C【詳解】句意：——Candy，你能幫我洗碗嗎？——對(duì)不起，媽媽。考查動(dòng)詞時(shí)態(tài)。s go to the cinema. There’s a new movie called Avengers IV. —Not now, I _____________ my brother David with his math.A．help B．helped C．a(chǎn)m helping D．have helped19．It dark. Shall I turn on the light？A．gets B．got C．is getting D．was getting20．Now ABC Cinema on Forest Road ________ the old film called Roman Holiday.A．is show B．is showing C．is showed D．is on21．— May I speak to Mr. Brown?— I am sorry. He ________ an important meeting in his office now.A．has B．had C．is having D．will have22．—Has your aunt finished writing her novel?—Not yet. She ________ it these days.A．wrote B．writes C．is writing D．will write23．Joe, answer the phone for me. I ________ how to make dumplings in the kitchen.A．learned B．a(chǎn)m learning C．have learned D．learn24．The students in our group ________ the final preparation for the match. We are sure to win.A．made B．a(chǎn)re making C．make D．will make25．You’d better not go this way. The workers _________ the road. A．have repaired B．a(chǎn)re repairing C．repaired D．will repair26．— Mom, I’m busy making the bed. Can you give me a hand? — Wait a moment. I ________ the floor.A．a(chǎn)m cleaning B．will clean C．was cleaning D．have cleaned27．—What is your mother doing, Linda? —She ________ dinner in the kitchen now.A．is cooking B．was cookin