The earth's crust is the outermost layer of the planet. it is very thin and is just like the skin of an apple. the crust is about 3-5 miles thick and about 25 miles thick under the continents.
I think that it is condition/ heatstroke but not sure
The conductor urged "All musicians should continue to practice for the remainder of the week."
This one looks the best to me. The only thing is there should be a comma next to, "urged"
