It was so nice of you to come to our aid. I don’t think we ______ it without you.   

A．can manageB．could have managed C．must have managed D．could manage

B

解析試題分析：句意：你能來幫助我們真是太好了，我認(rèn)為沒有你我們不可能已經(jīng)完成它。Could have done:可能已經(jīng)做了某事 must have done:一定已經(jīng)做了某事 根據(jù)句意可知表達(dá)一種對過去情況進(jìn)行虛擬，故用could/would/might/should+have done。故選B。
考點：考查虛擬語氣。

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