【正文】 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)在進行時am/is/are+doing結構，故選D?！獩]問題。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，請安靜。——沒問題。12．D【詳解】句意：——彼得，請安靜。根據(jù)句意可知，貝蒂不能加入我們是因為她正在打掃教室，強調此時此刻正在做什么，用現(xiàn)在進行時(am/is/are doing)。她正在打掃教室?？疾閯釉~時態(tài)。11．D【詳解】句意：貝蒂不能和我們一起玩紙牌游戲?？疾閯釉~時態(tài)辨析。解析：C【詳解】句意：請保持安靜。考查動詞時態(tài)辨析。10．C【詳解】句意：請保持安靜。根據(jù)“Where is your father, David?”可知，此處是詢問當前的情況，強調動作正在進行，用現(xiàn)在進行時，結構為：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，此處是詢問當前的情況，強調動作正在進解析：C【詳解】句意：——大衛(wèi)，你爸爸在哪里？ ——他正在花園里洗車。9．C【詳解】句意：——大衛(wèi)，你爸爸在哪里？ ——他正在花園里洗車。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，應用現(xiàn)在進行時，構成形式為be doing；主語“They”是復數(shù)形式，be用are；have的現(xiàn)在分詞是having。他們正在開派對。考查動詞時態(tài)。8．B【詳解】句意：噪音來自那群男孩。根據(jù)句中“Listen”提示，動作正在發(fā)生，故應用現(xiàn)在進行時。考查現(xiàn)在進行時。plays動詞第三人稱單數(shù)形式；played表一般過去時；will play表一般將來時；is playing表現(xiàn)在進行時。7．D【詳解】句意：聽！這個男孩又在彈鋼琴了。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)在進行時，結構：am/is/are+動詞ing，主語My brother是第三人稱單數(shù)，故be動詞用is。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)在進行時，結構：am/is/are+解析：C【詳解】句意：我現(xiàn)在必須離開了，我哥哥正在外面等我。6．C【詳解】句意：我現(xiàn)在必須離開了，我哥哥正在外面等我?？疾闀r態(tài)?？疾闀r態(tài)。故選C?？疾闀r態(tài)辨析。故選C?？疾闀r態(tài)辨析。故選C?？疾閯釉~時態(tài)和the number of的用法?？疾閯釉~時態(tài)和the number of的用法。故選B。選項A為一般將來時；選項B為現(xiàn)在進行時；選項C為現(xiàn)在完成時；選項D為過去進行時。 ——他正在為下周舉行的英語演講比賽做準備。選項A為一般將來時；選項B為現(xiàn)在進行時；選項C為現(xiàn)在完成時；選項D為過去進行時。 ——他正在為下周舉行的英語演講比賽做準備。根據(jù)“Tom, please give me a hand in moving the piano.”及語境可知，此處回答的動作是現(xiàn)在正在進行的，應用現(xiàn)在進行時，結構是“be+doing”，故選C。我在修我的車。根據(jù)“Tom, please give me a hand in moving the piano.”及語境可知解析：C【詳解】句意：——湯姆，請幫我搬一下鋼琴。我在修我的車。t find Mike in the classroom. Where is he?—Oh, he ________ in the library.A．was studying B．studied C．is studying D．studies17．—Yesterday I received a letter from .—You did? I hear he________for America next year.A．has left B．leaves C．left D．is leaving18．—Hurry up!—One moment. I ________ my s.A．reading B．a(chǎn)m reading C．was reading D．have read19．—Where is mum？ —She________in the kitchen．A．cooks B．is cooking C．will cook D．cooked20．— Tom, where is your little sister?— She _______ in the backyard now.A．is playing B．will play C．played D．plays21．—Tina, let’s go out for shopping.—Sorry, Amy. I __________ my homework.A．do B．a(chǎn)m doing C．did22．You had better not go this way. The workers _________ the road.A．have repaired B．a(chǎn)re repairing C．repaired D．will repair23．— 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 waiting24．My father ________ Beijing next week.A．leaves for B．is leaving for C．left D．leaves25．—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 made26．I can’t hear you. I ______ to an English speech.A．a(chǎn)m listening B．listen C．was listening27．Xifeng Street is closed today because workers _______ some repairs.A．make B．made C．a(chǎn)re making D．were making28．—Lo