I regret______ the work unfinished; I should have planned everything ahead carefully.

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问题 I regret______ the work unfinished; I should have planned everything ahead carefully.

选项 A、having been left
B、having left
C、to leave
D、to have left

答案B

解析 本题考查动词regret后接动名词或不定式的用法。regret doing:后悔做过某事,用完成时表示已经发生过的事情。regret to do:很抱歉要做某事。
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