The boss ______ the worker how to do it, or the accident couldn’t have happened.
A.can’t have toldB.ought to tellC.could have toldD.mustn’t have told
A

試題分析:意為:當時老板不可能告訴工人如何做這件事(是對過去的推測),否則這個事故不可能發(fā)生。
在英語中,我們對過去的推測,常使用情態(tài)動詞(not)+have done 結(jié)構(gòu),故選 A
點評:情態(tài)動詞對中國學(xué)生來講是一個難點,而情態(tài)動詞+have done(表對過去的一種推測)更是一個難點和重點,學(xué)生要注意區(qū)別。
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