1.(2010全國(guó)II) Excuse me. I _______ I was blocking your way.
A. didn’t realize B. don’t realize?C. haven’t realized D. wasn’t realizing
答案：A
解析：“抱歉，我不知道擋了你的路。”本題考查時(shí)態(tài)，“沒有意識(shí)到”這一動(dòng)作應(yīng)該發(fā)生在過(guò)去，故選A。

2.(2010安徽) Bob would have helped us yesterday, but he _______.
A. was busy B. is busy C. had been busy D. will be busy
答案：A
解析：“鮑勃昨天本來(lái)可以幫助我們的，但是他當(dāng)時(shí)很忙”。根據(jù)設(shè)空出前面would have helped us yesterday可知設(shè)空處表示的是昨天的事情，故用過(guò)去時(shí)，排除BD兩項(xiàng)；C項(xiàng)過(guò)去完成時(shí)表示“過(guò)去的過(guò)去”，而本句并沒有過(guò)去的動(dòng)作做參照物，故排除C項(xiàng)。只有A項(xiàng)符合要求。

3.(2009重慶) — I’ve got to go now.
— Must you? I __________ you could stay for dinner with us.
A. think B. thought C. have thought D. am thinking
答案：B
解析：句意“我現(xiàn)在得走了?！薄澳惴堑靡邌?我原以為你能留下和我們一起吃飯的”。句中主語(yǔ)“I”的動(dòng)作“認(rèn)為”發(fā)生在過(guò)去，所以只有B項(xiàng)正確。

4.(2009全國(guó)I) Edward, you play so well. But I __________ you played the piano.
A. didn’t know B. hadn’t known C. don’t know D. haven’t known
答案：A
解析：本題考查一般過(guò)去時(shí)。句意“愛德華，你彈得這么好。但是我不知道你會(huì)彈鋼琴”。根據(jù)句意，指我過(guò)去不知道你會(huì)彈鋼琴，故用一般過(guò)去時(shí)。

5.(2009北京) Scientists have many theories about how the universe __________ into being.
A. came B. was coming C. had come D. would come
答案：A
解析：句意“關(guān)于宇宙是怎樣產(chǎn)生的，科學(xué)家們有很多種理論”。根據(jù)句意可知宇宙產(chǎn)生絕非將來(lái)要發(fā)生的事，所以先排除B、D兩項(xiàng)，C項(xiàng)had come為過(guò)去的過(guò)去，題中無(wú)過(guò)去時(shí)間作參照，故排除C。宇宙產(chǎn)生發(fā)生在過(guò)去，故用一般過(guò)去時(shí)。

6.(2009北京) When I talked with my grandma on the phone, she sounded weak, but by the time we __________ up, her voice had been full of life.
A. were hanging B. had hung C. hung D. would hang
答案：C
解析：句意“當(dāng)我與奶奶在電話中交談時(shí)，她的聲音聽起來(lái)很虛弱，但到我們掛斷電話時(shí)，她的聲音已經(jīng)充滿了活力”。根據(jù)題干提示，her voice had been full of life為過(guò)去的過(guò)去，因此我們掛斷電話發(fā)生在過(guò)去，故選C。

7.(2009山東) I was out of town at the time, so I don’t know exactly how it _______.
A. was happening B. happened C. happens D. has happened
答案：B
解析：“那是我不在城里，所以我不確切地知道事情是怎么發(fā)生的”。根據(jù)題干中was out of town及前后邏輯關(guān)系可知設(shè)空處說(shuō)的是過(guò)去的事情，故用過(guò)去時(shí)，排除CD兩項(xiàng)；A項(xiàng)表示“未完性”，不符合本題要求，故被排除。

8.(2009湖南) When he _______ the door, he found his keys were nowhere.
A. would open B. opened C. had opened D. was to open
答案：D
解析：“當(dāng)他要開門的時(shí)候，他發(fā)現(xiàn)鑰匙不見了”。was to do表示wanted to do或intended to do。would do在這里有情感意為，所以被排除。

9.(2008北京) -- Have you read a book called Waiting for Anya?
-- Who _______ it?
A. writes B. has written C. wrote D. had written
答案：C
解析：“你讀過(guò)一本叫做《等待安雅》的書嗎？”“誰(shuí)寫的？”根據(jù)句意可知，發(fā)問(wèn)方是對(duì)過(guò)去的事情進(jìn)行提問(wèn)，故排除AB兩項(xiàng)，因這兩項(xiàng)都是現(xiàn)在時(shí)；而D項(xiàng)表示過(guò)去的過(guò)去，也不符合本題的要求，故也被排除。

10.(2008天津) He _______ football regularly for many years when he was young.
A. was playing B. played C. has played D. had played
答案：B?
解析：“他年輕的時(shí)候踢了許多年足球”。本題考查時(shí)態(tài)。句中的when he was young是表示過(guò)去的時(shí)間狀語(yǔ)。題干中沒有強(qiáng)調(diào)在過(guò)去的某個(gè)時(shí)間段正在發(fā)生某事，故排除A項(xiàng)；句中也沒有信息詞強(qiáng)調(diào)對(duì)現(xiàn)在造成的影響或與現(xiàn)在的聯(lián)系，故排除C項(xiàng)；句中也沒有以過(guò)去的某個(gè)時(shí)間點(diǎn)或動(dòng)作作參照，故排除D項(xiàng)。

11.(2007山東) They _______ two free tickets to Canada, otherwise they’d never have been able to afford to go.
A. had got B. got C. have got D. get
答案：B
解析：“他們得到了兩張去加拿大的免費(fèi)機(jī)票，不然他們永遠(yuǎn)都不會(huì)有錢去那兒?！眔therwise是虛擬語(yǔ)氣的暗示，從“they’d never have been able to…”可知，該句是已發(fā)生的事情的虛擬假設(shè)，而前半句是對(duì)過(guò)去事實(shí)的陳述，故選B。

12.(2007遼寧) -- Has your father returned from Africa yet?
-- Yes, but he _______ here for only three days before his company sent him to Australia.
A. was B. has been C. will be D. would be
答案：A
解析：“你父親從非洲回來(lái)了嗎？”“回來(lái)了，但是他在這兒只待了三天就被公司派到澳大利亞去了”。根據(jù)“before his company sent him…”，排除BCD，故選A。

13.(2007上海) — Did you tidy your room?
— No, I was going to tidy my room but I __________ visitors.?
A. had B. have C. have had D. will have
答案：A
解析：本題考查一般過(guò)去時(shí)。句意“……我正準(zhǔn)備打掃房間，但是有客人來(lái)了”。答句應(yīng)與問(wèn)句的時(shí)態(tài)一致，這些事情都發(fā)生在過(guò)去，故選A。