If that was true manzana it would have been wrote '... which handed an open infected wound, on his nose' as to hand is present tense, when it's talking about past tense. But this is also is wrong as it's talking about a wound which has had the time to become infected, meaning it already existed.

I believe it is a typo and should be 'Leo the lion was confined to a cage that was too small and had an open, infected wound on his nose.' This means that there was an open wound on Leo's nose that was infected.

In the first sentence it should be 'the words that confused me' or 'the confusing words' (closer to what you wrote), and the last sentence 'what I do takes time and effort and sometimes I think I can't stand it for long (or for a long time/for much longer). The reason is 's' makes it plural 'efforts' suggest you put more than 1 effort into it, but the correct way is 'it takes a lot of effort' or the opposite 'it takes no effort'. As for the answer what you do is sure to help become fluent in the language (although it is boring, very boring) but regardless, checking the definition of words you don't understand is a good thing, then you have to show understanding by putting the knowledge to use (making a sentence using that word). I don't really know a better method but to make it more fun you could try and associate the word with something funny (creating a link to another thing like a funny picture). Best way is to speak to people.

There are a few different ways to explain this, depending on how the words are used, in the way you used them, although both are 'indefinate' (not giving an exact number) they follow a hierarchy. This being couple: a couple meaning around 2, a few meaning around 3-5, several meaning around 7, some is usually between 7-10 mark. Other uses of 'some' would be someone, somebody, something and so forth.

Because it's actually Konnichiwa (the L looking character is 'n')

After More Than Three Years Self-study

I've been learning how to pronounce words and how to make stress. I am very anxious about my future recently. I don't want to fail at speaking English after I have been studying hard for more than three years. I don't want people make laugh at me, saying that I've been wasted my time.

 

Don't forget the 'tense' past, present and future, I would say being is present tense when you're talking about the past. I think you are being overly anxious, maybe you have been studying hard. You don't 'make laugh', you laugh, you don't laugh on people, you laugh at people (not always a bad thing). Fred told a really funny joke and I was laughing hard at it, I couldn't stop. Or you laugh with people. Fred told a really funny joke, I was laughing hard with the group, we all found it hilarious.

 

Now, about people laughing at you, who cares? You certainly shouldn't, you're the one making the effort, and making really good progress, how many languages do you think they will speak fluently? I would guess only 1 (the language they have spoke from a young age, English). Don't let it get to you, keep your head high and keep on practicing.