【正文】 “am/is/are doing”，主解析：B【詳解】句意：——該上學(xué)了。我正在等她。13．B【詳解】句意：——該上學(xué)了。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(shí)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。他在哪里？——哦，他在圖書館學(xué)習(xí)?？疾楝F(xiàn)在進(jìn)行時(shí)。12．C【詳解】句意：——我在教室里找不到邁克了。根據(jù)“Where is your father, David?”可知，此處是詢問當(dāng)前的情況，強(qiáng)調(diào)動作正在進(jìn)行，用現(xiàn)在進(jìn)行時(shí)，結(jié)構(gòu)為：am/is/are + 動詞現(xiàn)在分詞，主語為he，be動詞用is。根據(jù)“Where is your father, David?”可知，此處是詢問當(dāng)前的情況，強(qiáng)調(diào)動作正在進(jìn)解析：C【詳解】句意：——大衛(wèi)，你爸爸在哪里？ ——他正在花園里洗車。11．C【詳解】句意：——大衛(wèi)，你爸爸在哪里？ ——他正在花園里洗車。wear穿；根據(jù)“I’ll have it changed immediately”可知在說話的時(shí)候“毛衣穿反”這個(gè)動作正在進(jìn)行，用現(xiàn)在進(jìn)行時(shí)，結(jié)構(gòu)是：am/is/are + doing；主語是“You”，be動詞用are?！?，天吶！我馬上把它換過來。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！我馬上把它換過來。10．B【詳解】句意：——Lena，我想今天早上你很匆忙?？疾閯釉~時(shí)態(tài)?？疾閯釉~時(shí)態(tài)。故選B?？疾閯釉~時(shí)態(tài)?？疾閯釉~時(shí)態(tài)。故選B。 考查現(xiàn)在進(jìn)行時(shí)。 考查現(xiàn)在進(jìn)行時(shí)。now現(xiàn)在，是現(xiàn)在進(jìn)行時(shí)的標(biāo)志，需用be doing結(jié)構(gòu)；主語students復(fù)數(shù)人稱，be動詞用are，故選C。他們現(xiàn)在正在開會。now現(xiàn)在，是現(xiàn)在進(jìn)行時(shí)的標(biāo)志，需用be doing結(jié)構(gòu)；主語students復(fù)數(shù)人稱，be動詞用are，故選C。他們現(xiàn)在正在開會。故選A?？疾闀r(shí)態(tài)?？疾闀r(shí)態(tài)。故填B。考查動詞時(shí)態(tài)。根據(jù)前句“The noise es from the boys.”語境可推知，后句中動作正在進(jìn)行，應(yīng)用現(xiàn)在進(jìn)行時(shí)，構(gòu)成形式解析：B【詳解】句意：噪音來自那群男孩。他們正在開派對。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？——對不起，他正在開一個(gè)重要的會。主語he后接be動詞is?？疾楝F(xiàn)在進(jìn)行時(shí)。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。takes off動詞三單；is taking off現(xiàn)在進(jìn)行時(shí)；has taken off現(xiàn)在完成時(shí)；took off一般過去時(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，可推測出此處是用現(xiàn)在進(jìn)行時(shí)表將來，故選B。飛機(jī)正在起飛?？疾闀r(shí)態(tài)。s dad?—Oh, he ________ the flowers in the garden.A．waters B．is watering C．watered D．has watered19．—Where is Frank?—He _________ to music in his room.A．listens B．is listening C．listened D．was listening20．Excuse me. I really need to go now. My children _____________for me at school.A．a(chǎn)re waiting B．waits C．wait D．waited21．— Tom, what’s your sister doing?— She ________ her homework in the study.A．does B．will do C．did D．is doing22．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．— Helen, how was your English petition on Monday?— I have no idea, I _________ for the result. I was told it would e out in two days.A．was waiting B．waited C．will wait D．a(chǎn)m waiting25．—Where is your mother, Kitty?—She ________ dinner in the kitchen.A．cooks B．cooked C．is cooking D．will cook26．—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 lost27．—Lily, where is our father now? Go and get him for lunch. —Just a moment, please. Father ________ a phone call in his room.A．is making B．was making C．makes D．has made28．—Tina, let’s go out for shopping.—Sorry, Amy. I __________ my homework.A．do B．a(chǎn)m doing C．did29．—What’s that noise, Mike?—My little sister ________ with her toy car now.A．plays B．played C．will play D．is playing30．— Dad, I can’