【正文】 現(xiàn)在不行，我在幫我弟弟大衛(wèi)學(xué)數(shù)學(xué)。15．C【詳解】句意：——瑪麗，我們?nèi)タ措娪鞍伞ait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(guò)去時(shí)。我正在等他。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)在解析：B【詳解】句意：——媽媽?zhuān)F(xiàn)在很晚了。我正在等他。14．B【詳解】句意：——媽媽?zhuān)F(xiàn)在很晚了。flies是fly的第三人稱(chēng)單數(shù)形式；fly是動(dòng)詞原形；flew是fly的過(guò)去式。結(jié)構(gòu)為：主語(yǔ)+will/shall+動(dòng)詞原形、主語(yǔ)+am/is/are+動(dòng)名詞?！Ｄ懵猛居淇?。結(jié)構(gòu)為：主語(yǔ)+will/shall+動(dòng)詞原形、主語(yǔ)+am/is/are+動(dòng)名詞?！Ｄ懵猛居淇?。故選B。根據(jù)“Hurry up”可知此處表達(dá)的是現(xiàn)在正在做的事，用現(xiàn)在進(jìn)行時(shí)be doing。考查動(dòng)詞的的時(shí)態(tài)。reading 動(dòng)名詞；am reading動(dòng)詞的現(xiàn)在進(jìn)行時(shí)；was reading過(guò)去進(jìn)行時(shí)；have read動(dòng)詞解析：B【詳解】句意：——趕緊?！纫粫?huì)，我正在讀我的郵件。故選B。run out用完，用盡，是一個(gè)動(dòng)詞短語(yǔ)，不能用于被動(dòng)語(yǔ)態(tài)。我必須在沒(méi)油之前趕到加油站。run out用完，用盡，是一個(gè)動(dòng)詞短語(yǔ)，不能用于被動(dòng)語(yǔ)態(tài)。我必須在沒(méi)油之前趕到加油站。故選B?？疾闀r(shí)態(tài)。你的毛衣穿反了?？疾闀r(shí)態(tài)。你的毛衣穿反了。故選C。考查現(xiàn)在進(jìn)行時(shí)的用法?？疾楝F(xiàn)在進(jìn)行時(shí)的用法。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?！獩](méi)問(wèn)題。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。——沒(méi)問(wèn)題。8．D【詳解】句意：——彼得，請(qǐng)安靜。根據(jù)“He is in the kitchen.”和“now”可知，該句為現(xiàn)在進(jìn)行時(shí)，謂語(yǔ)結(jié)構(gòu)是：be+動(dòng)詞的現(xiàn)在分詞?？疾楝F(xiàn)在進(jìn)行時(shí)。will wash動(dòng)詞的一般將來(lái)時(shí)形式；is washing動(dòng)詞的現(xiàn)在進(jìn)行時(shí)形式；washes動(dòng)詞的三單形式；was解析：B【詳解】句意：——約翰在哪里？——他在廚房里。他正在洗碗。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(kāi)一個(gè)重要的會(huì)。主語(yǔ)he后接be動(dòng)詞is。考查現(xiàn)在進(jìn)行時(shí)。故選C?？疾楝F(xiàn)在進(jìn)行時(shí)的用法。考查現(xiàn)在進(jìn)行時(shí)的用法。故選D。考查現(xiàn)在進(jìn)行時(shí)。根據(jù)上句“Betty can’t join us in the game”，此處指的是現(xiàn)在發(fā)生的事，故應(yīng)用現(xiàn)在時(shí)，且根據(jù)解析：D【詳解】句意：貝蒂不能參加我們的比賽。她正在打掃教室。故選C?？疾闀r(shí)態(tài)辨析。故選C。考查時(shí)態(tài)辨析。故選B。選項(xiàng)A為一般將來(lái)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(guò)去進(jìn)行時(shí)。 ——他正在為下周舉行的英語(yǔ)演講比賽做準(zhǔn)備。選項(xiàng)A為一般將來(lái)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(guò)去進(jìn)行時(shí)。 ——他正在為下周舉行的英語(yǔ)演講比賽做準(zhǔn)備。takes off動(dòng)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(guò)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(cè)出此處是用現(xiàn)在進(jìn)行時(shí)表將來(lái)，故選B。飛機(jī)正在起飛。考查時(shí)態(tài)。 expect18．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．You’d better not disturb Kathy now as she ________ her speech for tomorrow’s meeting.A．is preparing B．will prepare C．was preparing D．has prepared21．—Tina, let’s go out for shopping.—Sorry, Amy. I __________ my homework.A．do B．a(chǎn)m doing C．did22．The students in our group ________ the final preparation for the match. We are sure to win.A．made B．a(chǎn)re making C．make D．will make23．— 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．—What is your mother doing, Linda? —She ________ dinner in the kitchen now.A．is cooking B．was cooking C．cooks D．cooking26．—Where is your mother, Kitty?—She ________ dinner in the kitchen.A．cooks B．cooked C．is cooking D．will cook27．—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 lost28．—Look out! Something ________ down from the tree.—Dear me! It’s too dangerous.A．falls B．