---The woman biologist stayed in Africa studying wild animals for 13 years before she returned.

---Oh, dear! She ______ a lot of difficulties!


  1. A.
    may go through
  2. B.
    might go through
  3. C.
    ought to have gone through
  4. D.
    must have gone through
D
前者所說(shuō)句意為“這位女生物學(xué)家回來(lái)之前,在非洲住了13年研究野生動(dòng)物”。因此后者所說(shuō)“她一定渡過(guò)了很多難關(guān)”。這一過(guò)程應(yīng)該是過(guò)去的事情,用情態(tài)動(dòng)詞對(duì)過(guò)去情況進(jìn)行推測(cè),應(yīng)該用“情態(tài)動(dòng)詞+have done”這一結(jié)構(gòu),故排除A和B項(xiàng);ought to have done相當(dāng)于should have done,意為“本應(yīng)該做某事但事實(shí)上沒(méi)有做”,不符合題意,故排除C項(xiàng);must have done意為“一定已經(jīng)做了……”,符合題意。
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(     )2. A. recommend      
(     )3. A. come          
(     )4. A. fear          
(     )5. A. always        
(     )6. A. self-protection
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(     )12. A. pushing      
(     )13. A. help          
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(     )15. A. made          
(     )16. A. may          
(     )17. A. my            
(     )18. A. still        
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B. offered          
B. astonishment      
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B. tom              
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