i called him four times,but he did not reply i did not know if i should call him time

题目

i called him four times,but he did not reply i did not know if i should call him time
选项有A the fifth B a fifth C five times,

答案

B
英语中用 a/an +序数词 表示 “再…… 又……”
本句句意是“我给他打了四次电话,但是他没有回复我,我不知道是否该再给他打一次（即第五次）.”
希望能帮到你,祝你开心.