猜谜语：1.What can hear you without ears and can answer you with

猜谜语：1.What can hear you without ears and can answer you without a mouth?2.What room has no walls,no doors,no windows,and no floors?3.What laarge instrument do you carry in your ears?4.What person tried to make you smile most of the time?5.What has a soft bed but never sleeps,a big mouth but never speaks?