The workers didn't find out what was the matter with the mac

The workers didn't find out what was the matter with the mac 英语单选题：They didn‘t find （）the medicine.A,what was the matter What做主语My sister didn't tell me What was the matter with the 为什么they didn't konw ( ) with the medice里填what was the matter he didn't know __ waht the matter was what was the matter 请解 （）1.The workers didn't find _______ the machine. what was the matter with the elephant I didn`t know what was the matter还是I didn`t know whatt he ma My sister didn't tell me__ the girl A what the matter was wi ---What’s the matter with John?---He didn’t pass the test bu They didn't know ( ) with the machine.A what is the matter.B -What's the matter with you?-He didn't pass the test but he