【正文】 Tom，你的姐姐在做什么？——她正在書房里做她的家庭作業(yè)。根據(jù)上文“You nearly hit the tree! What’s up”可知，這件事發(fā)生在現(xiàn)在，且結(jié)合語境可知，我快要撞到樹上時正在思考家鄉(xiāng)之旅，故此處應(yīng)為現(xiàn)在進(jìn)行時。根據(jù)問句“—Tom, where39。我正在等她。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。wear穿；根據(jù)“I’ll have it changed immediately”可知在說話的時候“毛衣穿反”這個動作正在進(jìn)行，用現(xiàn)在進(jìn)行時，結(jié)構(gòu)是：am/is/are + doing；主語是“You”，be動詞用are。15．B【詳解】句意：——Lena，我想今天早上你很匆忙。prepare準(zhǔn)備；is preparing現(xiàn)在進(jìn)行時；will prepare一般將來時；was preparing過去進(jìn)行時；has prepared現(xiàn)在完成時；根據(jù)時間狀語“now”可知，句子時態(tài)采用現(xiàn)在進(jìn)行時。我的孩子們在學(xué)校等我。presents動詞第三人稱單數(shù)形式；presented表一般過去時；has presented表現(xiàn)在完成時；is presenting表現(xiàn)在進(jìn)行時。考查時態(tài)。故選B。我必須在沒油之前趕到加油站。我們?nèi)椭伞?．D【詳解】句意：——托尼，快點(diǎn)！我們現(xiàn)在在等你。根據(jù)“I must leave now.”可知，我哥哥現(xiàn)在正在外面等我，時態(tài)是現(xiàn)在進(jìn)行時，結(jié)構(gòu)：am/is/are+動詞ing，主語My brother是第三人稱單數(shù)，故be動詞用is?？疾闀r態(tài)。根據(jù)語境可知，英語演講比賽下周舉行，杰克現(xiàn)在應(yīng)該是正在準(zhǔn)備，因此用現(xiàn)在進(jìn)行時；其結(jié)構(gòu)是：be（am/is /are）+動詞的現(xiàn)在分詞。2．B【詳解】句意：——我有幾天沒見到杰克了。我在做作業(yè)。t seen Jack for a couple of days. —He ________ for the English speaking petition which will take place next week.A．will prepare B．is preparing C．has prepared D．was preparing3．Listen! The birds ________ happily in the tree outside the window.A．sing B．sang C．a(chǎn)re singing D．were singing4．—Where is your father, Lily?—He ________ in the kitchen.A．cooked B．cooks C．will cook D．is cooking5．I must leave now. My brother ________ for me outside.A．waits B．waited C．is waiting D．was waiting6．— Tom, where is your little sister?— She _______ in the backyard now.A．is playing B．will play C．played D．plays7．—Tony, hurry up! We ________ for you now.—Just one minute.A．wait B．waited C．have waited D．a(chǎn)re waiting8．Grandma ________ dinner. Let’s go and help her.A．is making B．makes C．made D．was making9．My oil ________. I must go to the gas station before there is none left.A．has run out B．is running out C．has been run out D．is being run out10．—Peter, please be quiet. Your brother ________ on the phone.—No problem.A．records B．recorded C．was recording D．is recording11．— Shh, don’t make noise! Mrs. Smith ________ the latest news in the studio.— I’m sorry about that.A．presents B．presented C．has presented D．is presenting12．Excuse me. I really need to go now. My children _____________for me at school.A．a(chǎn)re waiting B．waits C．wait D．waited13．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 prepared14．—May I use your puter? —Sorry, I ________ on it.A．work B．worked C．have worked D．a(chǎn)m working15．— Lena, I guess you were in a hurry this morning. You ________ your sweater inside out.— Oh my god, I’ll have it changed immediately.A．wore B．a(chǎn)re wearing C．were wearing D．have worn16．—I can39。故解析：C【詳解】句意：——Candy，你能幫我洗碗嗎？——對不起，媽媽。選項(xiàng)A為一般將來時；選項(xiàng)B為現(xiàn)在進(jìn)行時；選項(xiàng)C為現(xiàn)在完成時；選項(xiàng)D為過去進(jìn)行時。考查現(xiàn)在進(jìn)行時。根據(jù)“Where’s your father, Lily?”可知，此處是詢問當(dāng)前的情況，表示正在做某事，用現(xiàn)在進(jìn)行時，故選D?？疾闀r態(tài)。根據(jù)“Tony, hurry up! We…for you now.”可知，此處強(qiáng)調(diào)動作正在發(fā)生，用現(xiàn)在進(jìn)行時，故選解析：D【詳解】句意：——托尼，快點(diǎn)！我們現(xiàn)在在等你。我們?nèi)椭?。根?jù)句意“…before there is none l解析：B【詳解】句意：我的油快要用完了?！獩]問題。 ——對此我很抱歉。我真得要走了。故選A?？疾閯釉~時態(tài)?？疾闀r態(tài)。他在哪里