(单选题) You ______her at the beginning, but now it is too late.(本题3.5分) A、 ought to have refused B、 ought to refuse C、 ought have refused D、 needn’t refuse

(单选题) You ______her at the beginning, but now it is too late.(本题3.5分)
A、 ought to have refused
B、 ought to refuse
C、 ought have refused
D、 needn’t refuse

出自：内蒙古农业大学-大学英语4

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