Quick help needed, this is important (grammar).

0 Hello ladies and gentlemen,02br
00I am completely new to this forum (as you may have already noticed), so please be understanding if I'm posting in the wrong category.02br
02br
00But first, let me introduce myself. My real name is Jacek (my English friends simply call me Jack, although that's quite misleading) and I come from Poland, I'm a 17 year-old high school student. My interests are generally computers (with an emphasis on web authoring), rock music, the English language and motoring... Well... I'm not good at speaking about myself, so if you have anymore questions about my person feel free to ask.02br
02br
00I'm writing this, because I'm taking part in a school contest in English and I need some help with grammar. You see, I've got quite a few sentences that I need to translate from Polish to English using the correct forms and tenses (and vocabulary, obviously). I know there might not be many Polish-speaking people around here, so I'll just post my translations and all that I am asking from you is to check whether they make sense from the grammatical point of view. This is really important, so I'd be incredibly grateful if someone could check and possibly correct these sentences as quick as it's possible (the contest's commencing on Monday).02br
02br
00Behold:02br
02br
001. We certainly cannot accuse Fred of being shy. Look how he enjoys talking about himself in front of television cameras.02br
02br
002. It has just been announced that everyone of those who has obtained less than 50 percent will have to take another exam. All of those, who will not be able to come to the US in Spring may apply for taking the exam in US embassies.02br
02br
003. Since no more than half a bottle of syrup was left, Granddad must have been taking his treatment very seriously. I bought five bottles last Monday.02br
02br
004. The new sytnthetic costs three times as much as cotton. But since it's here, no teenage girl will even look at old costumes. Well, the money which they spend isn't theirs, but their parent's.02br
02br
005. The fact is that no female journalist from the newspaper, whom had thrown these accusations was not present at the dinner, during which the Collonel has been telling or, as he claims, he hasn't been telling those racist jokes.02br
02br
006. Having decided months ago in advance what will be the topics of main speeches and who will be making them after whom, the organisers were unwilling to make any changes last-minute changes.02br
02br
007. Listen to this! Doesn't this change in Simon's voice suggest, that he might have realized at that moment, that the conversation is being recorded.02br
02br
008. Because of safety regulations we had to send two drivers instead of one. After a few hundred kilometers it turned out, that although they both have been driving buses for many years, none of them was used to driving in such heavy traffic.02br
02br
009. I doubt wheter they have a clear idea themselves how many rehearsals there should be before the show is ready for television.02br
02br
0010. Before the conference I would never have thought that translating a lecture about the history of fashion can be so difficult. I am afraid that a few listeners could have had doubts about my knowledge of French.02br
02br
0011. Please do not expect owners not to get upset when they are told that since the beginning of the strike you haven't managed to make a list of negotiators and experts.02br
02br
0012. As far as buying cosmetics is concerned, Laura is sceptical about advertising. She thinks, that the least advertised products are usually much cheaper than those that can be seen on TV.02br
02br
0013. From our point of view the latest proposal seems to be acceptable under the condition, that we won't have to pay for the equipment, we will not be using in the future.02br
02br
0014. Let's not argue about specific questions to be asked both guests until we make sure that Father John won't have anything against appearing in the same show with a strip dancer.02br
02br
0015. The manager decided that the best way of convincing customers that the juice is not radioactive was having every hundreth bottle checked by an independent laboratory.02br
02br
00Thank you in advance.0-