I regret the work unfinished; I everything ahead carefully. A. having been left;
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Iregret ________ the work unfinished; I ________ everything ahead carefully.
A.having been left; should plan
B.having left; should have planned
C.to leave; should have planned
D. to have left; should plan
试题答案
答案：B
解析：| regret doing／having done sth. “后悔做过某事”；should have done sth.过去该做某事没有做到表示责备。
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