帮我解答一下英语句子,谢谢! After（）seemed an endless wait,it was her turn

帮我解答一下英语句子,谢谢! After（）seemed an endless wait,it was her turn...
帮我解答一下英语句子,谢谢!
After（）seemed an endless wait,it was her turn to enter the personal manager＇s office.A.that B.thereC.whatDit