【正文】 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。根據(jù)答語“Sorry, I… on it.”的語境可推斷出，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，be用am，work的現(xiàn)在分詞是working。根據(jù)答語“Sorry, I… on it.”的語境可推斷出，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 do解析：D【詳解】句意：——我可以用你的電腦嗎？——對(duì)不起，我正在用它工作。13．D【詳解】句意：——我可以用你的電腦嗎？——對(duì)不起，我正在用它工作。由“I really need to go now. My children…for me at school”可知，因?yàn)楹⒆觽冋趯W(xué)校等我，所以我真得要走，故本句為現(xiàn)在進(jìn)行時(shí)態(tài)。我的孩子們?cè)趯W(xué)校等我。由“I really need to go now. My children…for me at school”可知解析：A【詳解】句意：請(qǐng)?jiān)徫摇Ｎ业暮⒆觽冊(cè)趯W(xué)校等我。12．A【詳解】句意：請(qǐng)?jiān)徫?。根?jù)“Tom, where is your father?”可知要回答現(xiàn)在在做什么，用現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)為am/is/are doing。根據(jù)“Tom, where is your father?”可知要回答現(xiàn)在在做什么，用現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)為am/解析：A【詳解】句意：——湯姆，你爸爸在哪里？——他正在修理我的自行車。11．A【詳解】句意：——湯姆，你爸爸在哪里？——他正在修理我的自行車?？疾闀r(shí)態(tài)?！獙?duì)不起。考查時(shí)態(tài)。——對(duì)不起。根據(jù)“can you take the dog for a walk?”以及回答“Sorry, Dad.”可知句子時(shí)態(tài)應(yīng)用現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)為be+動(dòng)詞的現(xiàn)在分詞，主語是I，be動(dòng)詞用am，take的現(xiàn)在分詞是taking，故選C。我在上網(wǎng)課。考查現(xiàn)在進(jìn)行時(shí)態(tài)。9．C【詳解】句意：——鮑勃，你能去遛遛狗嗎？——對(duì)不起，爸爸?？疾楝F(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。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，他正在開一個(gè)重要的會(huì)。主語he后接be動(dòng)詞is?？疾楝F(xiàn)在進(jìn)行時(shí)。故選C?？疾楝F(xiàn)在進(jìn)行時(shí)的用法?？疾楝F(xiàn)在進(jìn)行時(shí)的用法。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?？疾閯?dòng)詞時(shí)態(tài)。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)成解析：C【詳解】句意：——去看電影怎么樣？有部叫《嗨，媽媽》的新電影?！F(xiàn)在不行，我在幫我弟弟托尼學(xué)英語。故選D?？疾閯?dòng)詞時(shí)態(tài)。根據(jù)句意可知，貝蒂不能加入我們是因?yàn)樗诖驋呓淌?，?qiáng)調(diào)此時(shí)此刻正在做什么，用現(xiàn)在進(jìn)行時(shí)(am/is/are doi解析：D【詳解】句意：貝蒂不能和我們一起玩紙牌游戲。她正在打掃教室。故選B。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)。 ——他正在為下周舉行的英語演講比賽做準(zhǔn)備。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)。 ——他正在為下周舉行的英語演講比賽做準(zhǔn)備。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?？疾閯?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 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．It dark. Shall I turn on the light？A．gets B．got C．is getting D．was getting19．—Where is mum？ —She________in the kitchen．A．cooks B．is cooking C．will cook D．cooked20．—Hi, Daming. What are you up to?—I ________ a project about family history.A．do B．did C．a(chǎn)m doing D．was doing21．— 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．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．learn23．You had better not go this way. The workers _________ the road.A．have repaired B．a(chǎn)re repairing C．repaired D．will repair24．You’d better not go this way. The workers _________ the road. A．have repaired B．a(chǎn)re repairing C．repaired D．will repair25．—What is your mother doing, Linda? —She ________ dinner in the kitchen now.A．is cooking B．was cooking C．cooks D．cooking26．—Lucy, where is Mimi?—She ________ under the chair.A．sleeps B．slept