How does ultrasound work?

for the past ferfect tense, can I say I have worked or I had worked? thanks

a lot of my pictures on here have little a little red X on them and they wont come up. What so I do to make them work?

Like really I am not asking what works for a certain thing I am asking what weird random things work? Like you know - how ba...

My wife is pregnant and I got a suggestion that I should buy that for her. Where do they sell that and how does it work?

How many works in total did Michelangelo finish before he died including paintings, architecture, and sculptures?

I need to know the significance of Diego Rivera's works. like the messages that he is showing in all his works of art... Plea...

Just a random question I find amusing, The snow plough driver helps us along with are day whether that be clearing the roads ...

Ok ! I want no about my package it was sent to me 3 times but my bell didn't work so I missed ups and they sent my package ba...

Okay, do they meet up in the police station or have their own location? I'm thinking of the place that they would do paperwor...

Because I just opened it and the first thing that popped up was overwhelming and I had no idea what to pick.