Is this sentence OK? There must be a problem with the heating system since it is the only part of the building in which it is always cold. (It was written in a formal.letter)

Is this sentence ok? As to the end time of the event, it could not have been more suitable, since its ending quite early on Sunday evening will allow us to arrive at the bus station on time.

Is this sentence ok?

Last year, on another occasion, we stayed at a hotel not far from where the event in question will be held. 

Is this sentence grammatically correct ?

Can you please correct this? Dear Ms Romero, I am writing in reply to your letter concerning the International Sports Event. The sports in which the students wish to take part are basketball and tennis. Besides, quite a few boys have expressed their enthusiasm at the possibility of playing volleyball as well. As to the end time of the event, it could not have been more suitable , since its ending quite early on Sunday evening will allow us to arrive at the bus station on time. As far as accommodation is concerned, I have to inform you that we would prefer to make our own arrangements. Last year, on another occasion, we stayed at a hotel not far from the event in question.Since all the participants were satisfied with the quality of the accommodation , we have, therefore, decided to propose it again. Moreover, I would like you to give me your email address and phone number in case I require further information. Yours sincerely , Cristiana Rosselli

Can you correct this letter and tell me my level in English? Dear Ms Romero, I am writing in reply to you letter concerning the International Sports Event. The sports in which the students wish to take part are basketball and tennis. Besides, quite a few boys have expressed their enthusiasm at the possibility of playing volleyball as well. As to the end time of the event, it could not have been more suitable , since its ending quite early on the Sunday evening will allow us to arrive at the bus station on time. As far as accommodation is concerned, I have to inform you that we would prefer to make our own arrangements. Last year, on another occasion, we stayed at a hotel not far from the event in question.Since all the participants were satisfied with the quality of the accommodation , we have, therefore, decided to propose it again. Moreover, I would like you to give me your email address and phone number in case I require further information. Yours sincerely , Cristiana Rosselli

I need a correction (: please Keeping animals in zoos Keeping animals in zoos has become a prickly issue since it is a hotly-debated topic which often divides opinions. Is the aim of it positive or is it just entertainment for adults and children? Firstly, an important point worth considering is that in recent years the number of animal lovers has increased and many of them present themselves as real "warriors" fighting for animal rights. They consider keeping animals in zoos cruel not only because animals are obliged to live far away from their natural environment but also because a large number of these animals have showed significant changes in their behaviour: at times they look as though they are "sad", while whole families pass by their cages. Children often look at "that huge polar bear" or "that cute raccoon" with a grin on their faces, being unaware of how depressing living behind metal bars is. Notwithstanding, there are serious reasons why they are kept there. Take, by way of example, pandas. It is well-known that they are an endangered species and their captivity is the only way to prevent them from dying out. In conclusion, all things considered, we can deduce that captivity may be just if the only purpose is to keep animals safe from hunters or extinction.But if it is seen as entertainment, we all should reshape the concept of "entertainment".