单项选择题

I regret () the work unfinished; I should have planned everything ahead carefully.

A. having been left
B. having left
C. to leave
D. to have left

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单项选择题
Do what you think is right, () they say.

A. whatever
B. whichever
C. whenever
D. however
单项选择题
If this is the case, how is he () in blaming her

A. remarked
B. justified
C. produced
D. advanced
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