I （ ）not nut admit that something was wrong.用适当的情态动词填空

I （ ）not nut admit that something was wrong.用适当的情态动词填空
I （ ）not nut admit that something was wrong.用适当的情态动词填空

I （ ）not nut admit that something was wrong.用适当的情态动词填空
答案的确是could.
翻译：我不得不承认出问题了/有点不对劲.
can't/couldn't but do sth意思是“不得不做某事”.
因为从句中用了一般过去时（was）,所以主句也用过去时即：could (not but admit that...).

could.