Definition: used especially in reporting questions and when expressing doubt to mean if Level: B1
我不确定你是否会喜欢它。
I wasn't sure ___whether you'd like it.
她问我是否有兴趣为她工作。
She asked me ___whether I was interested in working for her.
我怀疑它是否会起作用。
I doubt ___whether it'll work.
