【正文】 much time as you________go to a shop or walk around crowded shopping centers.A．don’t have to B．oughtn’t toC．won’t D．mustn’t解析：　本題考查情態(tài)動詞。句意為：由于不必去商店或者擁擠的購物中心，網上購物能夠節(jié)省大量時間。根據(jù)句意，應選A。答案：　A5．(2011青島市聯(lián)合模擬)—Everyone in my class passed the exam.—Oh，really？It ________difficult.A．can’t have been B．needn’t have beenC．must be D．mightn’t be解析：　考查情態(tài)動詞。對過去進行推測，表示“一定不”應使用can’t have done。語意：——我們班上每個人都通過了考試。——哦，真的嗎？那題目一定不難。答案：　A6．(2011濟寧市第一次聯(lián)考)—Did you punish him for losing your digital camera?—Yes，but I don’t think I________.A．should do that B．need to have done soC．ought have done that D．should have done so解析：　考查情態(tài)動詞的用法。句意為：——他把你的數(shù)碼相機弄丟了，你處罰他了嗎？——是的。但我現(xiàn)在認為當時我不應該這樣做。shouldn’t have done “(過去)不應該做某事，但實際上已做了”。此處否定發(fā)生了轉移。答案：　D7．(2011合肥第二次教學檢測)It ________be really cold in Novermber in Hefei though we usually have warm and sunny days.A．should B．willC．must D．can解析：　考查情態(tài)動詞。can可表示常有的行為和情況，意為“有時會，時而可能”。句意為：盡管合肥十一月的時候常常很暖和，但有時候可能會很冷。根據(jù)語意選D項。答案：　D8．(2011陜西西安分科質檢)The well173。dressed lady was caught stealing in the fashion enough，she ________have done such a thing.A．would B．mustC．should D．might解析：　根據(jù)題干中的Strangely enough 可知，這里應該用should，表示驚訝，可譯為“竟然”。答案：　C9．(2011浙江嘉興摸底)—Mary’s score on the test is the highest in her class.—Really？She ________have studied very hard.A．may B．ought toC．must D．should解析：　may have done可能已經……；ought to have done 本應該……；must have done一定曾……，一定已經……；should have done 本應該……。句意為：——瑪麗的考試成績是全班最高的?！娴膯幔克欢ê芘α?。答案：　C10．(2010安徽皖南八校第二次聯(lián)考)—When shall we meet your cousin at the station?—His plane took off 2 hours ago，and it________reach at 5 pm.A．should B．couldC．must D．can解析：　should 的意思是“應該會，可能”，在這里表示對將來的推測，預期會……。答案：　A11．(2011黑龍江哈爾濱質檢)Don’t play with the dog，Jack，for it________be dangerous at times.A．shall B．shouldC．can D．must解析：　句意為：杰克，不要逗狗玩，因為狗有時可能是危險的。can 在此表示理論上的可能性，其他三項則無此意，故選C項。答案：　C12．(2011福建龍巖質檢一)“Attention， can answer one of my questions ________receive a prize，” the teacher said in class.A．might B．shallC．should D．would解析：　shall用于第二和第三人稱時，可以表示警告、命令、允諾、威脅等語氣；might 表示可能性很小；should 表示“應該(義務性)”；would 表示意志(意愿)。這里選B項表示允諾。答案：　B13．(2011浙江溫州十校聯(lián)合體模擬)—Where is Lucy?—I can’t say where she is，but she________have gone to meet her classmates，for they want to go to Sichuan to work as volunteers.A．can B．shouldC．must D．may解析：　這里表示對過去狀況的推斷，用“情態(tài)動詞＋have done”。從前面的“我不確定她在哪里”可知，用may have done，表示“過去可能已經做了……”(不確定)。must have done表示“過去一定做了……”(非常確定)；can have done 用在否定句和疑問句中，should have done 表示“過去本該做……(實際卻沒做)”。答案：　D14．(2010吉林長春畢業(yè)班第一次調研)—Has Tim started？He said he would join in the party.— is a man of his word.A．could have left B．must have leftC．can’t e D．won’t be ing解析：　根據(jù)He is a man of his ，因此推測他肯定已經啟程了。 句意為：——Tim 啟程了嗎？他說他要參加聚會?！欢ㄒ呀泦⒊塘耍且粋€守信的人。must have done“一定干了某事”，故B項正確。答案：　B15．(2011安徽合肥質檢)—Mum，would you please buy me an MP5 player?—If you can help do the dishes the whole vacation，you ________have one as a reward.A．must B．needC．would D．shall解析：　shall用于第一、三人稱問句中表示征詢對方意見；shall用于第二、三人稱的肯定句中，表示“警告、許諾、命令、威脅”等語氣。答句句意：如果你整個假期能夠幫助洗盤子的話，就會得到一個MP5作為回報。shall表示允諾。答案：　D15．(2011安徽蕪湖調研)If human beings had been a bit less greedy and cruel，more birds and animals________dying out.A．ought to avoid B．could have been avoidedC．should have avoided D．might have avoided解析：　句意為：如果人類少點貪婪少點殘忍，更多的鳥類和動物就有可能免于滅絕。這里考查的是對過去情況的假設，從句用had done，主句用would/could/might have done。avoid “避免”，其后接doing 時沒有被動語態(tài)。答案：　D16．(2011哈爾濱檢測)________anyone call，please tell him I’m not free.A．Must B．CanC．May D．Should解析：　本題考查情態(tài)動詞用法。句意為：如果有人給我打電話，就告訴他我很忙。第一個分句是省略了if 虛擬條件句，補充完整為：If anyone should call，please tell him I’m not 省略時，句子要倒裝，故D項正確。答案：　D17．(2011北京海淀期末)If you hadn’t taken such a long time to get dressed，we ________there by now.A．would be B．areC．have been D．had been解析：　句意為：如果不是你穿衣服花了那么長時間的話，我們現(xiàn)在就到那里了。從句用了與過去相反的虛擬語氣，但主句與現(xiàn)在情況相反，故選A項。答案：　A18．(2011福建龍巖檢測)—I didn’t attend the lecture yesterday.—I________，either，if my mother hadn’t reminded me.A．wouldn’t B．wouldn’t haveC．didn’t D．hadn’t解析：　考查虛擬語氣。從句子中if my mother hadn’t reminded me 知，此處是對過去狀況的虛擬，主句應該用should/would/could/might＋have done結構，從選項中看只有B項合適(I wouldn’t have 是I wouldn’t have attended the lecture的省略)。答案：　B19．(2010南通二模)—How much of the foreign expert’s speech have you understood?—Next to wish I________harder at English.A．worked B．had workedC．would work D．were working解析：　考查虛擬語氣。wish 后的賓語從句用虛擬語氣，此處表示與過去事實相反，意思是：我希望我(過去)更努力地學習英語了。答案：　B20. (2010合肥二模)—Did you make it at last?— for your help，it________a serious loss.A．would cause B．must have causedC．would have caused D．may cause解析：　考查虛擬語氣。句意為：——你們最后成功了嗎？——成功了，要不是你的幫助，我們的損失就大了。but for...要不是……。答案：　C 27