【正文】 用現(xiàn)在進行時，其構(gòu)成為“am/is/are doing”，主語“I”為第一人稱，應(yīng)用am構(gòu)成現(xiàn)在進行時，故選B。我正在等她。上句提到還沒有上車，所以此句是說正在等待琳達，應(yīng)用現(xiàn)在進行時，其構(gòu)成為“am/is/are doing”，主解析：B【詳解】句意：——該上學了。我正在等她。13．B【詳解】句意：——該上學了?？疾闀r態(tài)?？疾闀r態(tài)。故選A?？疾楝F(xiàn)在進行時的用法?？疾楝F(xiàn)在進行時的用法。故選B?？疾闀r態(tài)。你的毛衣穿反了?？疾闀r態(tài)。你的毛衣穿反了。故選D?？疾楝F(xiàn)在進行時。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，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。touch摸，主語they是復數(shù)人稱，系詞需用are，故選D?？疾閯釉~時態(tài)辨析。look“看”用于提醒，后面的句子需用現(xiàn)在進行時“be doing”結(jié)構(gòu)。8．D【詳解】句意：——軍官們在哪兒？——瞧！他們正在宮殿里摸象?？疾閯釉~時態(tài)。根據(jù)“What are you up to”可知，答語要用現(xiàn)在進行時，表示現(xiàn)在正在進行的動作，結(jié)構(gòu)為a解析：C【詳解】句意：——嗨，大明。你在忙什么？——我正在做一個關(guān)于家族史的項目。now現(xiàn)在，是現(xiàn)在進行時的標志，需用be doing結(jié)構(gòu)；主語students復數(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)在進行時的標志，需用be doing結(jié)構(gòu)；主語students復數(shù)人稱，be動詞用are，故選C。他們現(xiàn)在正在開會。故選A。考查時態(tài)?？疾闀r態(tài)。故填B?？疾閯釉~時態(tài)。根據(jù)前句“The noise es from the boys.”語境可推知，后句中動作正在進行，應(yīng)用現(xiàn)在進行時，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D?？疾閯釉~時態(tài)?？疾閯釉~時態(tài)。故選B。cooks烹飪，一般現(xiàn)在時；is cooking烹飪，現(xiàn)在進行時；will cook烹飪，一般將來時；cooked烹飪，一般過去時。cooks烹飪，一般現(xiàn)在時；is cooking烹飪，現(xiàn)在進行時；will cook烹飪，一般將來時；cooked烹飪，一般過解析：B【詳解】句意：——媽媽在哪里？——她正在廚房做飯。2．B【詳解】句意：——媽媽在哪里？——她正在廚房做飯。根據(jù)題干中“Where is he?”可知要回答現(xiàn)在在哪里，用現(xiàn)在進行時表示“正在圖書館學習”，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，他在圖書館學習?？疾楝F(xiàn)在進行時。s not at home. She___________in the library.A．read B．reads C．is reading D．was reading20．—May I use your puter? —Sorry, I ________ on it.A．work B．worked C．have worked D．a(chǎn)m working21．Sorry, you can’t take the eraser away, Tony. I ________ it.A．have used B．used C．was using D．a(chǎn)m using22．—Has your aunt finished writing her novel?—Not yet. She ________ it these days.A．wrote B．writes C．is writing D．will write23．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．learn24．— 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 cleaned25．My father ________ Beijing next week.A．leaves for B．is leaving for C．left D．leaves26．—Where is your mother, Kitty?—She ________ dinner in the kitchen.A．cooks B．cooked C．is cooking D．will cook27．—Lucy, where is Mimi?—She ________ under the chair.A．sleeps B．slept C．is sleeping D．will sleep28．Xifeng Street is closed today because workers _______ some repairs.A．make B．made C．a(chǎn)re making D．were making29．—Hello, may I speak to Jim?—Sorry, he ________ an important meeting now.A．has B．is having C．will have D．was having30．—Where’s Nick?—He ________ classes at school.A．had B．will have C．is having D．was having31．—Mary, may I use your ipad for an hour?—Sorry. I ________ on it.A．work B．a(chǎn)m working C．have worked D．worked32．Be quiet! The students ________ an English exam.A．take B．a(chǎn)re taking C．took D．have made33．Mum ________ fish in the kitchen. It smells so good.A．cooks B．is cooking C．was cooking D．will cook34．—Tom, where is your father?—He ________ my bike.A．is repairing B．repairs C．has repaired D．will repair35．It’s 4 o’