【正文】 刻正在進(jìn)行的動(dòng)作，所以用現(xiàn)在進(jìn)行時(shí)（am/is/are doing）。根據(jù)“Can you give me a hand?”和“Wait a moment.”可知解析：A【詳解】句意：——爸爸，我解不出這道數(shù)學(xué)題。27．A【詳解】句意：——爸爸，我解不出這道數(shù)學(xué)題。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(xiě)讀書(shū)報(bào)告。故選A。根據(jù)“where is your father now”可知是問(wèn)父親現(xiàn)在正在解析：A【詳解】句意：——麗麗，我們的父親現(xiàn)在在哪里？去叫他來(lái)吃午飯。根據(jù)“We…ground as a leader in the field of IT with the others speeding up development.”可知，此處強(qiáng)調(diào)動(dòng)作正在進(jìn)行中，用現(xiàn)在進(jìn)行時(shí)，故選A?？疾楝F(xiàn)在進(jìn)行時(shí)的用法?？疾闀r(shí)態(tài)。我被告知將它將在兩天后出來(lái)。考查動(dòng)詞時(shí)態(tài)。工人們正在修路?？疾楝F(xiàn)在進(jìn)行時(shí)態(tài)。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)在進(jìn)行時(shí)am/is/are+doing結(jié)構(gòu)，故選D。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(qǐng)安靜。20．D【詳解】句意：——彼得，請(qǐng)安靜。get變得。19．C【詳解】句意：天正在變黑，我可以打開(kāi)燈嗎？考查現(xiàn)在進(jìn)行時(shí)。解析：B【詳解】句意：——弗蘭克在哪兒？——他正在房間里聽(tīng)音樂(lè)。18．B【詳解】句意：——弗蘭克在哪兒？——他正在房間里聽(tīng)音樂(lè)。A是一般現(xiàn)在時(shí)；B是現(xiàn)在進(jìn)行時(shí)；C是過(guò)去進(jìn)行時(shí)；D是一般過(guò)去時(shí)。你在等別人嗎？——是的。我們很久沒(méi)見(jiàn)面了。故選B。考查動(dòng)詞的時(shí)態(tài)。故選D?！娴?？ 我聽(tīng)說(shuō)他明年要去美國(guó)。根據(jù)next year可知是一般將來(lái)時(shí)態(tài)。根據(jù)語(yǔ)境可知，此處指的應(yīng)該是正在準(zhǔn)備做某事，表示正在進(jìn)行的動(dòng)作要用現(xiàn)在進(jìn)行時(shí)，結(jié)構(gòu)是“am/ is/ are doing”，主語(yǔ)students是復(fù)數(shù)，be動(dòng)詞用are，故選B。14．B【詳解】句意：——那個(gè)糟糕的噪音是什么？——學(xué)生們正在準(zhǔn)備聚會(huì)。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A?？疾闀r(shí)態(tài)?？疾楝F(xiàn)在進(jìn)行時(shí)的用法。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。10．C【詳解】句意：——Candy，你能幫我洗碗嗎？——對(duì)不起，媽媽?？疾楝F(xiàn)在進(jìn)行時(shí)。根據(jù)“now”可知要用現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)為be doing?？疾闀r(shí)態(tài)。考查時(shí)態(tài)。故選A。根據(jù)“Let’s go and help her”可知，此處指讓我們?nèi)椭谧鐾盹埖哪棠?，故為現(xiàn)在進(jìn)行時(shí)，其結(jié)構(gòu)為am/is/a解析：A【詳解】句意：奶奶正在做晚飯。根據(jù)“What are you up to”可知，答語(yǔ)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am/is/are doing，故選C?？疾閯?dòng)詞時(shí)態(tài)?？疾閯?dòng)詞時(shí)態(tài)辨析?？疾閯?dòng)詞時(shí)態(tài)辨析。根據(jù)問(wèn)句“where is your little sister”及后面的now可知，此處強(qiáng)調(diào)動(dòng)作正在進(jìn)行，應(yīng)該用現(xiàn)在進(jìn)行時(shí)，構(gòu)成為am/is/are doing，此處主語(yǔ)是第三人稱(chēng)單數(shù)，所以用is playing。4．A【詳解】句意：——湯姆，你的小妹妹在哪里?——她現(xiàn)在正在后院玩。他們正在開(kāi)派對(duì)。3．B【詳解】句意：噪音來(lái)自那群男孩。根據(jù)上文“Hello. May I speak to Laura, please?”及下文“Sorry, she39。我可以和勞拉講話(huà)嗎？——對(duì)不起，她不在家。我可以和勞拉講話(huà)嗎？——對(duì)不起，她不在家?？疾閯?dòng)詞時(shí)態(tài)?？疾閯?dòng)詞時(shí)態(tài)。 expecting D．Did。s dad?—Oh, he ________ the flowers in the garden.A．waters B．is watering C．watered D．has watered17．—You look absentminded. ________you ________someone?—Yes. An old friend of mine is ing. We haven39。s not at home. She___________in the library.A．read B．reads C．is reading D．was reading3．The noise es from the boys. They _______ a party.A．have B．a(chǎn)re having C．will have D．have had4．— Tom, where is your little sister?— She _______ in the backyard now.A．is playing B．will play C．played D．plays5．Be quiet, please. They _________ a meeting now.A．have B．had C．a(chǎn)re having D．were having6．—Hi, Daming. What are you up to?—I ________ a project about family history.A．do B．did C．a(chǎn)m doing D．was doing7．Grandma ________ dinner. Let’s go and help her.A．is making B．makes C．made D．was making8．—Tom, please give me a hand in moving the piano. —Sorry. I ________ my car.A．repair B．repaired C．a(chǎn)m repairing D．have repaired9．—Hello, may I speak to Jim?—Sorry, he ________ an important meeting now.A．has B．is having C．will have D．was having10．—Candy, could you please help me do the dishes?—Sorry, Mom. I ________ my homework.A．do B．did C．a(chǎn)m doing D．have done11．I must leave now. My brother ________ for me outside.