【題目】You never know how much difficulty we had ___the problem．Luckily, we managed to solve it with his help.

A． working out B． work out

C． worked out D． to work out

【答案】A

【解析】解析過(guò)程：考查非謂語(yǔ)動(dòng)詞。句意：你永遠(yuǎn)不會(huì)知道我們解決這個(gè)問(wèn)題有多困難。幸運(yùn)的是，在他的幫助下我們?cè)O(shè)法解決了。本題主語(yǔ)考查have difficulty doing somehing 這一結(jié)構(gòu)，故選A

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