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【分析】句意為“到我鎖門的時(shí)候,我才意識(shí)到把鑰匙忘在家里了”,表示“把某物遺忘在某處”要用leave。該動(dòng)作發(fā)生在realized之前,用過(guò)去完成時(shí),故選D。【點(diǎn)評(píng)】本題考查過(guò)去完成時(shí)的用法。13.My grandparents for fifty years by the time My sister was 15. A.marriedB.had marriedC.had got marriedD.had been married【答案】D 【解析】【分析】句意:到我妹妹十五歲的時(shí)候,我的祖父母已經(jīng)結(jié)婚五十年了。根據(jù)for fifty years 五十年和be動(dòng)詞was,可知是表示一段時(shí)間的狀語(yǔ),謂語(yǔ)動(dòng)詞具有持續(xù)性,用過(guò)去完成時(shí)had been married“結(jié)婚”表狀態(tài)。故選D。【點(diǎn)評(píng)】本題考查過(guò)去完成時(shí),注意通過(guò)時(shí)間狀語(yǔ)及動(dòng)詞判斷句子的時(shí)態(tài)。14.—Peter, _______ you _______ your homework?—Not yet, I39。ll do it at once.A.have。 finishedB.Did。 finishC.Will。 finish【答案】 A 【解析】【分析】句意:——皮特,你完成作業(yè)了嗎?——還沒(méi)有,我馬上做。根據(jù)Not yet, I39。ll do it at ,所以句子時(shí)態(tài)用現(xiàn)在完成時(shí),現(xiàn)在完成時(shí)的結(jié)構(gòu)have+done,故選A?!军c(diǎn)評(píng)】此題考查句子時(shí)態(tài)。要根據(jù)上下文的聯(lián)系確定句子時(shí)態(tài)。15.—Did you see Tom at the party?—No, he by the time I got there.A.leftB.was leavingC.had leftD.has left【答案】 C 【解析】【分析】by the time的從句用過(guò)去時(shí),主句用過(guò)去完成時(shí),表示主句的動(dòng)作先發(fā)生,故選C。句意是:在我到那里之前他已經(jīng)離開了。【點(diǎn)評(píng)】本題考查過(guò)去完成時(shí)的用法。16.— your father a newspaper when you got home?— No, .A.Was; reading; he wasB.Did; read; he didC.Was; reading; he wasn39。tD.Did; read; he didn39。t【答案】C 【解析】【分析】句意:—當(dāng)你到家的時(shí)候,你爸爸正在讀報(bào)紙嗎?—不,沒(méi)有。此題考查在過(guò)去的某個(gè)時(shí)間發(fā)生的事情,用過(guò)去進(jìn)行時(shí),其結(jié)構(gòu)為was/were doing,其疑問(wèn)式為提前be動(dòng)詞,否定式回答為:No,主語(yǔ)+be動(dòng)詞后加not。根據(jù)句意,故選C?!军c(diǎn)評(píng)】考查一般疑問(wèn)句的構(gòu)成和回答,過(guò)去進(jìn)行時(shí)態(tài),根據(jù)時(shí)間狀語(yǔ)選擇合適的時(shí)態(tài)。17.My parents ______________ to work by the time I ______________ up. A.began。 getB.began。 had gotC.had begun。 had gotD.had begun。 got【答案】 D 【解析】【分析】句意:我起床的時(shí)候,我的父母已經(jīng)開始工作了。began開始,一般過(guò)去時(shí);had begun開始,過(guò)去完成時(shí);get up 起床,一般現(xiàn)在時(shí);had got up起床,過(guò)去完成時(shí)。by the time到……時(shí)候,從句用一般過(guò)去時(shí), 表示“截止到從句動(dòng)作發(fā)生時(shí),主句動(dòng)作已經(jīng)完成,即過(guò)去的過(guò)去”,主句用過(guò)去完成時(shí),故選D?!军c(diǎn)評(píng)】考查動(dòng)詞的時(shí)態(tài)。注意by the time的詞義和用法。18.——Jim, did you take out the trash just now?——No. By the time I came home it .A.have been taken outB.had taken outC.had bee