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When Marx was in London, he _____ read at the library for hours.
A．wouldB．mightC．couldD．should
A
would表示過(guò)去的習(xí)慣性動(dòng)作, would 后跟行為動(dòng)詞，不跟表示狀態(tài)的動(dòng)詞，往往有時(shí)間狀語(yǔ)，而used to表示過(guò)去的習(xí)慣動(dòng)作時(shí)后跟的動(dòng)詞無(wú)限制，無(wú)需有時(shí)間狀語(yǔ)，如：
I used to like chocolate.        (√)
When I was a child, I would like chocolate.        (×)
I used to be a university student.          (√)
I would be a university student.           (×)
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