be left hanging (in the air/in midair)

To remain unresolved or unaddressed. I don't think he's very knowledgeable on this topic—my very basic question was left hanging in the air.

Name	Pronounced	Usage
Natanael	-	Spanish, Portuguese
BolesŁAwa	baw-le-SWAH-vah	Polish (Rare)
Caedmon	KAD-mən (English)	History
Reiner	RIE-ner (German)	German, Ancient Germanic
Gershon	GUR-shahn (English)	Biblical, Biblical Hebrew
Charlot	shar-LO	French