Please help with correct preposition My sister is a schoolgirl. She studies in the second class. My brother is a student. He studies for the second year. Sorry, I am not sure how to say - studies for/at or in. Please help.

How I've broken the collarbone. Recently I was doing freesbee with my mates and nothing seemed to be wrong that day... But unluckily I run into another player miscalculating opponent's track on the field. I was running like mad with maximum speed and believed that I can get the disk, so did the player from the other team. We crashed, fell on the grass, felt terrible pain. Somebody had screamed that freesbee is non-contact sport and badly sweared showing his annoyance of that terrible play. I don't know the damage that got another player, but I hope he's doing fine. At that moment I was totally concentrated on the sting pain in my shoulder. I had asked captain to be replaced and moved out of the playing-zone. Several minutes later pain hadn't dissapeared and I decided to move to the nearest emergency station suspecting bone fracture... Broken right collarbone(fortanatelly without displacement)... At least 5 weeks of arm immobilization... It would be 'increadibly interresting' summer for me...

'great' meaning very big Hi. Today I had a conflict with my college, because he said that 'great' doesn't sound right in the sentence: 'We have great problems'. I use it very often in meaning 'very big' or 'huge'? So is it correct to say so or I’d better pick other adjective?

Grammar question. Is it grammatically correct to say : 1) "I demanded him to apologise" instead of "I demanded that he apologise" 2) "It's essential that everyone is here on time" instead of "it's essential that everyone be here on time" Second sentences are taken from the book, so they should be correct

French sentense Q Hello. 'il y a beaucoup de taxis' - There are a lot of taxis Is it correct sentense? I want to say at least 'il y a beaucoup deS taxis' because it is plural.

Keep my head above the water vs Keep my head above water. Hi. I have question. I know that "Keep my head above water" is idiom and contains no "the" before water. But what if it is used as real sentence meaning that somebody is drowning and other person is trying to save first one. During the process first person says "Keep my head above THE water" or "Keep my head above water"?

Using "there" with meaning "here" Hi. I have heard phrase: "Hi there". Is it possible to use there instead of here interchangeably in some sentences? Give me example, please(If it is correct form, of course)

The environment we live in change in the next 50 years I thought a lot about environment and I can say that situation is getting harder every year. People continue to destroy the nature. We are cutting down forests for our needs, we are killing animals just for fun, we are spending resources the Earth has been creating during billions of years. Despite the fact that everybody understands the risks and damage we have already done to the world, only a few people actually stopped doing this. Nowadays we have a lot of problems that need attention. The most dangerous problem is pollution - thousand tonnes of garbage is being thrown every day. This will lead to over-dumping, lack of fresh water and human diseases. The next big problem is ocean pollution - many ocean inhabitants would disappear from the planet soon if people will not stop dumping the garbage into the water. There are many other human activities that causes tonnes of issues with environment. Almost all of them will stop if humans just disappear from the planet. Concluding the above I can say that the biggest problem is people. We are destroying our home... Maybe it will change in 50 years but I don't think so. Think about it!

Pros and cons of vegan diet. My thoughts about it There is no one way to eat for everyone. People are different. I think that eating every type of food is required for everyone. And there are some reasons why I think so. Against diet: 1) These diets don't help to lose weight. 3) There is no health reason to do so. 4) A lack of certain vitamins. 5) Plants are living organisms too. We can't protect them all from ourselves. For diet 1) Much lower risk to get certain diseases. 2) Such diet is usually well-planned. Such "food plan" has a big variety of elements and vitamins required. PS: Please correct mistakes in this writing=)