【正文】 happily in the tree outside the window.A．sing B．sang C．a(chǎn)re singing D．were singing5．Listen! The boy ________ the piano again.A．plays B．played C．will play D．is playing6．—Hello, may I speak to Jim?—Sorry, he ________ an important meeting now.A．has B．is having C．will have D．was having7．— Tom, where is your little sister?— She _______ in the backyard now.A．is playing B．will play C．played D．plays8．—Tony, hurry up! We ________ for you now.—Just one minute.A．wait B．waited C．have waited D．a(chǎn)re waiting9．The zoo keeper is worried because the number of visitors ________ smaller and smaller.A．bee B．a(chǎn)re being C．is being D．have bee10．— What’s that noise, Sam?— My little brother ________ his toy car.A．played B．is playing C．plays D．was playing11．—Can Peter play games with us, Mrs. Hawking?—Wait a minute. He ________ a shower.A．is taking B．taken C．took D．was taking12．—May I speak to Mr. Brown? —I am sorry. He _______ an important meeting in his office at the moment.A．has B．had C．is having D．will have13．— Where are the officers? — Look! They ________ the elephant in the palace now.A．touched B．will touch C．touch D．a(chǎn)re touching14．—Peter, please be quiet. Your brother ________ on the phone.—No problem.A．records B．recorded C．was recording D．is recording15．—May I use your puter? —Sorry, I ________ on it.A．work B．worked C．have worked D．a(chǎn)m working16．Ladies and gentlemen, please remain in your seats, fasten your seat belt and bring your seat back. The plane________.A．takes off B．is taking off C．has taken off D．took off17．—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．—Mary, let39。根據(jù)“Tom, please give me a hand in moving the piano.”及語(yǔ)境可知解析：C【詳解】句意：——湯姆，請(qǐng)幫我搬一下鋼琴。選項(xiàng)A為一般將來時(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為過去進(jìn)行時(shí)?？疾闀r(shí)態(tài)?？疾楝F(xiàn)在進(jìn)行時(shí)。根據(jù)句中“Listen”提示，動(dòng)作正在發(fā)生，故應(yīng)用現(xiàn)在進(jìn)行時(shí)?？疾楝F(xiàn)在進(jìn)行時(shí)。根據(jù)問句“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)是第三人稱單數(shù)，所以用is playing。根據(jù)“Tony, hurry up! We…for you now.”可知，此處強(qiáng)調(diào)動(dòng)作正在發(fā)生，用現(xiàn)在進(jìn)行時(shí)，故選D。 考查現(xiàn)在進(jìn)行時(shí)?？疾楝F(xiàn)在進(jìn)行時(shí)的用法。又因?yàn)橹髡Z(yǔ)為He，單數(shù)，be動(dòng)詞用is。touch摸，主語(yǔ)they是復(fù)數(shù)人稱，系詞需用are，故選D?？疾闀r(shí)態(tài)。16．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?！娴?？ 我聽說他明年要去美國(guó)。根據(jù)next year可知是一般將來時(shí)態(tài)?？疾閯?dòng)詞的的時(shí)態(tài)?？疾闀r(shí)態(tài)。20．C【詳解】句意：請(qǐng)保持安靜。21．B【詳解】句意：——我找不到大衛(wèi)，他在哪兒？——他在家準(zhǔn)備明天的比賽。這些天她正在寫?？疾闀r(shí)態(tài)辨析。考查動(dòng)詞時(shí)態(tài)。根據(jù)“next week”可知句子用一般將來時(shí)，leave for...動(dòng)身去某地，表示“位移”的動(dòng)詞可用現(xiàn)在進(jìn)行時(shí)表示將來，結(jié)構(gòu)是be do解析：B【詳解】句意：我父親下周要?jiǎng)由砣ケ本Ｎ以诼犚粋€(gè)英語(yǔ)演講?？疾楝F(xiàn)在進(jìn)行時(shí)。解析：C【詳解】句意：——當(dāng)心！有東西從樹上掉下來。故選C?？疾闀r(shí)態(tài)?？疾闀r(shí)態(tài)?？疾闀r(shí)態(tài)辨析。face動(dòng)詞原形；faces第三人稱單數(shù)；is facing現(xiàn)在進(jìn)行時(shí)，主語(yǔ)為單數(shù)形式；are facing現(xiàn)在進(jìn)行解析：D【詳解】句意：目前，南蘇丹的許多兒童正面臨著饑餓的問題。解析：B【詳解】句意：媽媽正在廚房煮魚。我在上網(wǎng)課?？疾楝F(xiàn)在進(jìn)行時(shí)。根據(jù)后句“I was told it would e in two days.”可推知，空處的動(dòng)作應(yīng)是正在進(jìn)行，應(yīng)用現(xiàn)在進(jìn)行時(shí)，構(gòu)成形式為：be doing；主語(yǔ)“I”是第一人稱單數(shù)形式，助動(dòng)詞應(yīng)用am；wait的現(xiàn)在分詞是waiting。presents動(dòng)詞第三人稱單數(shù)形式；presented表一般過去時(shí)；has presented表現(xiàn)在完成時(shí)；is presenting表現(xiàn)在進(jìn)行時(shí)?？疾閯?dòng)詞時(shí)態(tài)