Correct

抑或

/ yìhuò / 
Strokes

Definition

or/could it be that...?

Example

As a Conjunction

or

1
Tāmen
他们
shì
是
lái
来
  
,
yìhuò
抑或
shì
是
bù
不
lái
来
  
,
shàngwèi
尚未
kězhī
可知
  
。

It's not clear yet whether they will come or not.