—Must we do our homework first? —No, you___. You may have a rest first.

A. mustn't B. needn't C. may not D. can't

B 【解析】句意：--我們首先必須做作業(yè)嗎？-不必了，你們可以先休息一下。A. mustn't禁止，不要； B. needn't不必；C. may not 也許不；D. can't不能，不會，表示推測“不可能”。 Must we…?的否定回答可以用No, you don’t have to ./No, you. needn't；以must引出的一般疑問句，其肯定回答通常是用must來回答。根...

I told Sally how to get here, but perhaps I _______ for her.

A. had to write it out B. must have written it out

C. should have written it out D. ought to write it out

C 【解析】句意：我告訴Sally如何到達(dá)這里，但是也許我應(yīng)該給她寫出來。A. had to write it out不得不把它寫出來； B. must have written it out一定把它寫出來了，表示對過去的一種推測，說話的語氣很肯定；C. should have written it out應(yīng)該把它寫出來，表示過去應(yīng)該做的事情而沒有做； D. ought to write i...

—There were already five people in the car but they managed to take me as well.

—It _______ a comfortable journey.

A. can’t be B. shouldn’t be

C. mustn’t have been D. couldn’t have been

D 【解析】句意：--車?yán)镆呀?jīng)有五個人了，但是他們還設(shè)法帶著我。--它不可能是一次舒適的旅行。A. can’t be不可能是，是對現(xiàn)在的推測； B. shouldn’t be不應(yīng)該是，是對現(xiàn)在的推測。根據(jù)第一句可知，這里的旅行發(fā)生在過去，所以對現(xiàn)在的推測的選項是不正確的，故排除AB； must have done“一定做過某事”表示對過去的推測,不能用于否定句，故排除C；D. coul...

It’s nearly seven o’clock. Jack _______ be here at any moment.

A. must B. Need C. should D. can

C 【解析】句意：接近七點了，杰克隨時會來到這里。A. must一定，表示推測時，語氣比較肯定； B. need需要； C. should應(yīng)該，語氣較肯定，通常是指非�？赡艿氖拢ò凳居幸欢ǖ氖聦嵏鶕�(jù)或合乎常理）；D. can可能，表示推測時，一般用于否定句或疑問句。根據(jù)It’s nearly seven o’clock.可知，一般情況下這個時間杰克會來這里，有一定的根據(jù)，也就是安常理來說這個...

Johnny, you _______ play with the knife, you _______ hurt yourself.

A. won’t; can’t B. mustn’t; may

C. shouldn’t; must D. can’t; shouldn’t

B 【解析】句意：Johnny，你不要玩刀，你也許會傷到自己。A. won’t不將; can’t 不能；B. mustn’t禁止，不應(yīng)該; may也許；C. shouldn’t不應(yīng)該; must一定，表示推測的可能性大； D. can’t不可能; shouldn’t不應(yīng)該。play with玩弄。第一空表示的是禁止做某事，禁止玩刀；玩刀也許會傷到自己，不能說一定會傷到自己。故選B。 ...

The fire spread through the hotel very quickly but everyone _______ get out.

A. had to B. would

C. could D. was able to

D 【解析】句意：火在旅館蔓延地很快，但是每一個人都逃出去了。A. had to不得不； B. would過去將來；C. could能，表示過去有某種能力，但不一定會去做； D. was able to經(jīng)過努力做到了。根據(jù)The fire spread through the hotel very quickly火蔓延地很快， but表示前后是轉(zhuǎn)折關(guān)系，火雖然很大，但是人們還是逃出去了。表示...

—When can I come for the photos? I need them tomorrow afternoon. —They _______ be ready by 12:00.

A. can B. should C. might D. need

B 【解析】句意：--什么時間我能來取照片？我明天下午需要它們。--它們應(yīng)該在12點之前準(zhǔn)備好。答語人在此用的是推測語氣。can表推測時，只能用于疑問句和否定句，且常推測現(xiàn)在和過去，不能推測將來。might可推測將來，但語氣極不肯定，用于此處不符合答話人的身份。should亦可用于推測將來，其語氣比較肯定，意為“一定會，想必會”，根據(jù)I need them tomorrow afternoo...

—I stayed at a hotel while in New York. —Oh, did you? You _______ with Barbara.

A. could have stayed B. could stay

C. would stay D. must have stayed

A 【解析】句意：--在紐約的時候我住在旅館里。--哦，是嗎？你本來可以和Barbara住在一起。A. could have stayed過去本來可以做的而未做；B. could stay能夠住在；C. would stay過去將住在； D. must have stayed過去一定住。根據(jù)I stayed at a hotel while in New York可知，在紐約的時候是住在旅館...

--- Are you coming to Jeff’s party?

--- I’m not sure. I _______ go to the concert instead

A. must B. would C. should D. might

D 【解析】 試題分析：must必須，一定；would將要；should應(yīng)該；might可能，表示推測語氣。句意：你來參加杰夫的聚會嗎？——我不確定。我可能要去參加音樂會。結(jié)合語境可知下文表示推測，故選D。

I was really anxious about you. You _______ home without a word.

A. mustn’t leave B. shouldn’t have left

C. couldn’t have left D. needn’t leave

B 【解析】句意：我真地很擔(dān)心你，你不應(yīng)該沒有說一句話就離家出走了。couldn’t have done過去不可能做了某事；態(tài)動詞+動詞原形是對現(xiàn)在或未來的推測，不符合句意，故排除選項AD；根據(jù)I was really anxious about you.可知，這里的擔(dān)心發(fā)生在過去，所以離開家也發(fā)生在過去，對過去的動作的一種責(zé)備用shouldn’t have done不應(yīng)該做某事而做了。故選...