【正文】 !”可知，判斷設(shè)空處的動(dòng)作“發(fā)送電子郵件”在說話時(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。考查時(shí)態(tài)。根據(jù)“I…a book report now. Can I talk to you later?”可知，此處強(qiáng)解析：C【詳解】句意：——我正在寫讀書報(bào)告。39．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。根據(jù)前句“Not now”語境可知，后句的動(dòng)作正在進(jìn)行，應(yīng)用現(xiàn)在進(jìn)行時(shí)，構(gòu)成形式為be doing；主語“I”是第一人稱單數(shù)形式，故助動(dòng)詞應(yīng)用am；help的現(xiàn)在分詞是helping。根據(jù)上文“could you help pick up the phone”，結(jié)合麥琪的肯定回答，可知ring是正在發(fā)生的動(dòng)作，需用be doing現(xiàn)在進(jìn)行時(shí)結(jié)構(gòu)。根據(jù)語境可知，為了讓對方安靜下來，此句應(yīng)強(qiáng)調(diào)學(xué)生現(xiàn)在正在考試這個(gè)事情；強(qiáng)調(diào)此刻正在進(jìn)行的動(dòng)作，時(shí)態(tài)應(yīng)用現(xiàn)在進(jìn)行時(shí)，其構(gòu)成為“be doing”。我正用著呢。 ——我來了，媽媽。考查現(xiàn)在進(jìn)行時(shí)。考查現(xiàn)在進(jìn)行時(shí)。30．C【詳解】句意：——我能和Mr. Brown說話么？——對不起，他現(xiàn)在正在開一個(gè)重要的會(huì)議。考查動(dòng)詞的時(shí)態(tài)。故選C。listen to聽；根據(jù)上文“I can’t hear you”，可知是因?yàn)檎诼犙葜v，所以聽不到你說話，需用現(xiàn)在進(jìn)行時(shí)，結(jié)構(gòu)為am/is/are doing。考查現(xiàn)在進(jìn)行時(shí)的用法?？疾闀r(shí)態(tài)。你能幫我一下嗎？——等一下。考查動(dòng)詞時(shí)態(tài)?？疾楝F(xiàn)在進(jìn)行時(shí)。考查動(dòng)詞時(shí)態(tài)。read讀書，原形；reads讀書，第三人稱單數(shù)； is reading 正在讀書，現(xiàn)在進(jìn)行時(shí)；was reading正在讀書，過去進(jìn)行時(shí)。19．C【詳解】句意：——你好。故選B。故選B。根據(jù)上文“解析：B【詳解】句意：——你看起來心不在焉。s dad?”可知，答語“他在澆花”應(yīng)是現(xiàn)在進(jìn)行時(shí)。wait表一般現(xiàn)在時(shí)；am waiting表現(xiàn)在進(jìn)行時(shí)；has waited表現(xiàn)在完成時(shí)；waited表一般過去時(shí)。14．B【詳解】句意：——媽媽，現(xiàn)在很晚了?？疾閯?dòng)詞時(shí)態(tài)。上句提到還沒有上車，所以此句是說正在等待琳達(dá)，應(yīng)用現(xiàn)在進(jìn)行時(shí)，其構(gòu)成為“am/is/are doing”，主解析：B【詳解】句意：——該上學(xué)了。根據(jù)問句“What’s that noise, Mike?”可知，提到的聲響是現(xiàn)有的，結(jié)合答句中“now”解析：D【詳解】句意：——邁克，那是什么聲音？——我的弟弟現(xiàn)在正在玩他的玩具汽車。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。她正在打掃教室。prepare準(zhǔn)備；is preparing現(xiàn)在進(jìn)行時(shí)；will prepare一般將來時(shí)；was prepa解析：A【詳解】句意：你最好現(xiàn)在不要打擾凱西，因?yàn)樗跒槊魈斓臅?huì)議準(zhǔn)備演講。根據(jù)語境可知，此時(shí)不能幫媽媽洗碗，是因?yàn)檎谧鲎鳂I(yè)，應(yīng)用現(xiàn)在進(jìn)行時(shí)，構(gòu)成形式為：be doing。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，請安靜。根據(jù)“What are you up to”可知，答語要用現(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。考查時(shí)態(tài)。他們正在開派對。選項(xiàng)A為一般將來時(shí)；選項(xiàng)B為現(xiàn)在進(jìn)行時(shí)；選項(xiàng)C為現(xiàn)在完成時(shí)；選項(xiàng)D為過去進(jìn)行時(shí)。s not at home. She___________in the library.A．read B．reads C．is reading D．was reading20．—May I use your puter? —Sorry, I ________ on it.A．work B．worked C．have worked D．a(chǎn)m working21．— Where is Tom?— Look! He ________with the teacher over there.A．talk B．talks C．talked D．is talking22．You had better not go this way. The workers _________ the road.A．have repaired B．a(chǎn)re repairing C．repaired D．will repair23．— 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 cleaned24．My father ________ Beijing next week.A．leaves for B．is leaving for C．left D．leaves25．—How do you find your pany?—A little worried. We ________ ground as a leader in the field of IT with the others speeding up development.A．a(chǎn)re losing B．were losing C．lost D．have lost26．I can’t hear you. I ______ to an English speech.A．a(chǎn)m listening B．listen C．was listening27．Xifeng Street is closed today because workers _______ some repairs.A．make B．made C．a(chǎn)re making D．were making28．—Look out! Something ________ down from the tree.—Dear me! It’s too dangerous.A．falls B．fell C．is falling D．was falling29．Listen! The birds ________ happily in the tree outside the window.A．sing B．sang C．a(chǎn)re singing D．were singing30．— 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 have31．—Has your aunt finished writing her novel?—Not yet. She _____