她根本不在乎别人怎么想。
She ___couldn't ___care ___less what people think.
经理对我们的投诉漠不关心。
The manager ___couldn't ___care ___less about our complaints.
至于期末考试,他根本不在乎复习。
As for the final exam, he ___couldn't ___care ___less about preparing for it.