I saw her in the office this morning. She ________ back to work without the doctor's permission.
A.couldn't comeB.couldn't have comeC.should have comeD.should not have come在线课程D
此题考查情态动词的完成式。“should not have come back”表示“本不该回来”(但实际上已经回来了)，含有责备的口气，符合题意。