Hi,<br/>are the following sentences correct?<br/><br/><b>1] I must've been sleeping when you said that.</b><br/><br/><b>2] -Where's the car?</b><br/><b> -I've parked it in the garage.</b><br/><br/><b>3] The problem that worries me the most is that I can't affect what's going to happen next.</b><br/><br/><b>4] She dumped me because I was acting like a fool at the party.</b><br/><br/><b>5] The ceremony will be/is held on 18th December.</b><br/><br/><b>6] We sat quietly,watching the sun go/going over the horizon. </b>(not sure whether to use go or going - what is the difference?)<br/><br/><b>7] I've put the books on the shelf so that the kids won't be able to get at them.</b><br/><br/>Thank you in advance.