【正文】 主語“They”是復(fù)數(shù)形式，be用are；have的現(xiàn)在分詞是having?？疾閯?dòng)詞時(shí)態(tài)。根據(jù)句意問句詢問媽媽現(xiàn)在在哪里，可知是現(xiàn)在進(jìn)行時(shí)，表示媽媽正在做飯。考查動(dòng)詞時(shí)態(tài)。s not at home.”可知，這里是現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)是be doing的形式。她正在圖書館看書。她正在圖書館看書。根據(jù)上文“You nearly hit the tree! What’s up”可知，這件事發(fā)生在現(xiàn)在，且結(jié)合語境可知，我快要撞到樹上時(shí)正在思考家鄉(xiāng)之旅，故此處應(yīng)為現(xiàn)在進(jìn)行時(shí)?？疾閯?dòng)詞時(shí)態(tài)。選項(xiàng)A為一般現(xiàn)在時(shí)；選項(xiàng)B為一般過去時(shí)；選項(xiàng)C為現(xiàn)在進(jìn)行時(shí)；選項(xiàng)D為現(xiàn)在完成時(shí)。選項(xiàng)A為一般現(xiàn)在時(shí)；選項(xiàng)B為一般過去時(shí)；選項(xiàng)C為現(xiàn)在進(jìn)行時(shí)；選項(xiàng)解析：C【詳解】句意：——瑪麗，我們?nèi)タ措娪鞍伞?6．C【詳解】句意：——瑪麗，我們?nèi)タ措娪鞍伞Ｎ艺诘人?。我正在等他。主語是I，此處用am reading?！纫粫?huì)，我正在讀我的郵件。14．B【詳解】句意：——趕緊。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。故選C。故解析：C【詳解】句意：——Candy，你能幫我洗碗嗎？——對(duì)不起，媽媽。12．C【詳解】句意：——Candy，你能幫我洗碗嗎？——對(duì)不起，媽媽。根據(jù)“can you take the dog for a walk?”以及回答“Sorry, Dad解析：C【詳解】句意：——鮑勃，你能去遛遛狗嗎？——對(duì)不起，爸爸。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D?？疾楝F(xiàn)在進(jìn)行時(shí)?？疾楝F(xiàn)在進(jìn)行時(shí)。格林女士正在和她的朋友喝茶?？疾楝F(xiàn)在進(jìn)行時(shí)。她正在打掃教室。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。根據(jù)前句“The zoo keeper is worried”的語境可知，后句動(dòng)作應(yīng)是正在進(jìn)行，故時(shí)態(tài)應(yīng)用現(xiàn)在進(jìn)行時(shí)，構(gòu)成形式為：be doing，故排除A、D項(xiàng)；the number of，表示“……的數(shù)量”，作主語時(shí)，謂語動(dòng)詞用單數(shù)形式，故排除B項(xiàng)。6．C【詳解】句意：動(dòng)物園管理員很擔(dān)心，因?yàn)橛慰蛿?shù)量越來越少?！F(xiàn)在不行，我在幫我弟弟托尼學(xué)英語。5．C【詳解】句意：——去看電影怎么樣？有部叫《嗨，媽媽》的新電影。根據(jù)“Wait a minute.”可知，彼得現(xiàn)在正在洗澡，強(qiáng)調(diào)動(dòng)作正在進(jìn)行，所以時(shí)解析：A【詳解】句意：——霍金夫人，彼得可以和我們一起玩游戲嗎？ ——等一會(huì)兒，他正在洗澡。“正在用”時(shí)態(tài)是現(xiàn)在進(jìn)行時(shí)。我稍后給你。3．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?？疾閯?dòng)詞時(shí)態(tài)?？疾閯?dòng)詞時(shí)態(tài)?？疾闀r(shí)態(tài)。考查時(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 helped17．—Hey! You nearly hit the tree! What’s up?— Sorry, I ________ the trip to my hometown.A．think about B．a(chǎn)m thinking about C．was thinking about D．thought about18．— Hello. May I speak to Laura, please?—Sorry, she39。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．—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 using4．—Can Peter play games with us, Mrs. Hawking?—Wait a minute. He ________ a shower.A．is taking B．taken C．took D．was taking5．—What about going to the cinema? There’s a new movie called Hi, Mom.—Not now, I ________ my brother Tony with his English.A．help B．helped C．a(chǎn)m helping D．have helped6．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 bee7．—Hello! May I speak to Tom?—One moment! He _______ an .A．is sending B．sent C．sends D．was sending8．Betty can’t join us in the game. She ________ the classroom.A．has cleaned B．was cleaning C．has cleaned D．is cleaning9．It’s 4 o’clock in the afternoon. Ms. Green ________ afternoon tea with her friends.A．has B．is having C．had D．was having10．—Tony, hurry up! We ________ for you now.—Just one minute.A．wait B．waited C．have waited D．a(chǎn)re waiting11．—Bob, can you take the dog for a walk?—Sorry, Dad. I ________ an online class.A．take B．took C．a(chǎn)m taking D．have taken12．—Candy, could you plea