【正文】 ng D．were singing4．I must leave now. My brother ________ for me outside.A．waits B．waited C．is waiting D．was waiting5．Listen! The boy ________ the piano again.A．plays B．played C．will play D．is playing6．The noise es from the boys. They _______ a party.A．have B．a(chǎn)re having C．will have D．have had7．— What’s that noise, Sam?— My little brother ________ his toy car.A．played B．is playing C．plays D．was playing8．—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 have9．—What’s that noise, Mike?—My little sister ________ with her toy car now.A．plays B．played C．will play D．is playing10．—Candy, could you please help me do the dishes?—Sorry, Mom. I ________ my homework.A．do B．did C．a(chǎn)m doing D．have done11．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 bee12．—May I use your puter? —Sorry, I ________ on it.A．work B．worked C．have worked D．a(chǎn)m working13．—What’s the terrible noise?—The students ________ for a party.A．have prepared B．a(chǎn)re preparing C．prepare D．will prepare14．Listen! Someone __________ in the next room.A．sings B．sang C．was singing D．is singing15．—Yesterday I received a letter from .—You did? I hear he________for America next year.A．has left B．leaves C．left D．is leaving16．—I _____to Beijing tomorrow. —Have a good trip!A．flies B．fly C．a(chǎn)m flying D．flew17．—Mary, let39。s go to the cinema. There’s a new movie called Avengers IV. —Not now, I _____________ my brother David with his math.A．help B．helped C．a(chǎn)m helping D．have helped18．—Tom, where39。我真得要走了?？疾閯?dòng)詞時(shí)態(tài)。我真得要走了?？疾閯?dòng)詞時(shí)態(tài)。故選A。考查動(dòng)詞時(shí)態(tài)。考查動(dòng)詞時(shí)態(tài)。根據(jù)句意問(wèn)句詢問(wèn)媽媽現(xiàn)在在哪里，可知是現(xiàn)在進(jìn)行時(shí)，表示媽媽正在做飯。3．C【詳解】句意：聽(tīng)!鳥兒在窗外的樹上快樂(lè)地歌唱。句中“Listen”是現(xiàn)在進(jìn)行時(shí)態(tài)的標(biāo)志詞，其結(jié)構(gòu)為am/is/are+動(dòng)詞現(xiàn)在分詞，主語(yǔ)“The birds”是復(fù)數(shù)，be動(dòng)詞解析：C【詳解】句意：聽(tīng)!鳥兒在窗外的樹上快樂(lè)地歌唱。句中“Listen”是現(xiàn)在進(jìn)行時(shí)態(tài)的標(biāo)志詞，其結(jié)構(gòu)為am/is/are+動(dòng)詞現(xiàn)在分詞，主語(yǔ)“The birds”是復(fù)數(shù)，be動(dòng)詞用are，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。故選C?？疾楝F(xiàn)在進(jìn)行時(shí)。根據(jù)句中“解析：D【詳解】句意：聽(tīng)！這個(gè)男孩又在彈鋼琴了。plays動(dòng)詞第三人稱單數(shù)形式；played表一般過(guò)去時(shí)；will play表一般將來(lái)時(shí)；is playing表現(xiàn)在進(jìn)行時(shí)。故選D。他們正在開派對(duì)。根據(jù)前句“The noise es from the boys.”語(yǔ)境可推知，后句中動(dòng)作正在進(jìn)行，應(yīng)用現(xiàn)在進(jìn)行時(shí)，構(gòu)成形式解析：B【詳解】句意：噪音來(lái)自那群男孩?？疾閯?dòng)詞時(shí)態(tài)。故填B。 考查現(xiàn)在進(jìn)行時(shí)。 考查現(xiàn)在進(jìn)行時(shí)。故選B?？疾楝F(xiàn)在進(jìn)行時(shí)?？疾楝F(xiàn)在進(jìn)行時(shí)。又因?yàn)橹髡Z(yǔ)為He，單數(shù)，be動(dòng)詞用is。9．D【詳解】句意：——邁克，那是什么聲音？——我的弟弟現(xiàn)在正在玩他的玩具汽車。根據(jù)問(wèn)句“What’s that noise, Mike?”可知，提到的聲響是現(xiàn)有的，結(jié)合答句中“now”解析：D【詳解】句意：——邁克，那是什么聲音？——我的弟弟現(xiàn)在正在玩他的玩具汽車。根據(jù)問(wèn)句“What’s that noise, Mike?”可知，提到的聲響是現(xiàn)有的，結(jié)合答句中“now”可知，是說(shuō)現(xiàn)在正在進(jìn)行的動(dòng)作，用現(xiàn)在進(jìn)行時(shí)。10．C【詳解】句意：——Candy，你能幫我洗碗嗎？——對(duì)不起，媽媽?？疾閯?dòng)詞時(shí)態(tài)。故解析：C【詳解】句意：——Candy，你能幫我洗碗嗎？——對(duì)不起，媽媽?？疾閯?dòng)詞時(shí)態(tài)。故選C?？疾閯?dòng)詞時(shí)態(tài)和the number of的用法?？疾閯?dòng)詞時(shí)態(tài)和the number of的用法。故選C?？疾閯?dòng)詞時(shí)態(tài)。考查動(dòng)詞時(shí)態(tài)。故選D?？疾闀r(shí)態(tài)。考查時(shí)態(tài)。14．D【詳解】句意：聽(tīng)！有人正在旁邊的房間里唱歌。根據(jù)“Listen!”可知，本句時(shí)態(tài)是現(xiàn)在進(jìn)行時(shí)，主語(yǔ)“Someone”表單數(shù)，故選D。考查現(xiàn)在進(jìn)行時(shí)。15．D【詳解】句意：——昨天我收到了安先生的來(lái)信?？疾闀r(shí)態(tài)。謂語(yǔ)動(dòng)詞leave是位移動(dòng)詞，用進(jìn)行時(shí)表示將來(lái)。解析：D【詳解】句意：——昨天我收到了安先生的來(lái)信。考查時(shí)態(tài)。謂語(yǔ)動(dòng)詞leave是位移動(dòng)詞，用進(jìn)行時(shí)表示將來(lái)。16．C【詳解】句意：——明天我將坐飛機(jī)去北京?？疾橐话銓?lái)時(shí)。根據(jù) tomorrow及選項(xiàng)，可知謂解析