You will know you have mastered the language when you speak with fluency, when words just flow and you can express your complete thoughts. I think one never stops learning... not even one's mother language. I would dedicated at least 30 minutes a day for the new languages that you clearly know that you have not mastered. Speak, read, write, immerse yourself in it. You will over a period of time acquire more confidence to know you got it. I'm a believer that you can learn several languages at a time. When I study one, I don't think of the other. Just be present and focus and review your material periodically. Practice! Practice! Practice!

Also she was not misunderstood, because you immediately knew that your tone was an issue. The only person that seemed to have been misunderstood was you in this case, buddy! Because you were the person that meant to say/ explain something and got misunderstood in the process. I hope this helps and that you were able to square it all out afterwards.

I don't think this was a case of misunderstanding. If so, she misunderstood the time of the call. Which apparently was 2 hours prior to her response. The fact that you could not talk or connect with her in a video conference is what upset her. How your tone may have come across telling her "no" (twice) in one phone call is also open for interpretation. She misunderstood you if you feel like you have done nothing wrong and yet she was upset for no reason with your excuse and/or tone. I hope this helps!

Rock solid in this case means that the findings/source are not trustworthy and should not be trusted. Because it may be inaccurate!

It means that the artists collectively realized that there was a better way to do things and challenged the set of ideologies established before them. They were aware and started to question the way of doing things. That's what I understood from the exerpt!

It means that the artists collectively realized that there was a better way to do things and challenged the set of ideologies established before them. They were aware and started to question the way of doing things. That's what I understood from the exerpt!

I agree with Arthur. Also your question should be: Is it correct? or Is this correct?

-Describing a place

My favorite room in my house is.my kitchen. Perhaps because the kitchen is the most important room in many homes, but ours is actually a very special place, because not only this is where we cook and eat, but also this where my family and friends come together.
I have so many happy memories including ordinary daily events, such as making breakfast in the dark, cold winter mornings, having big Sunday meals with my whole family, spending afternoons and having countless wonderful times there with those I love or special ocassions and while cooking, and preparing Christmas dinners or making decorations for a birthday party.
So what does this special room look like? In our case, it is much bigger than an ordinary kitchen, in fact, it's huge compared to most. It's big enough to have a large rectangular table in the centre. At one end there is a big cooking stove. Next to the stove there is a sink and large fridge. At the other end there is a large wooden cupboard. Next to the cupboard,  there is a TV mounted on the right wall with a shelf full of books and DVD's.
We use the kitchen not only to cook and eat, but also to relax, to watch movies, to spend quality family time and to have lots of fun.
What I like most about this room is that all the family and friends are constantly coming into the kitchen and joining in whatever is happening at any given time of the day.
I definitely think that the kitchen is the heart of the house.  I have no doubt thay some of the happiest times of my life have been spent there... or  "No doubt I have spent the happiest time of my life there!"