Here's my take on your question. 37. They made an important breakthrough. important progress ? like in a investigation ? Yes. Although I think a better word to describe "breakthrough" would be "a big improvement." it can mean also a couple [breaked up] broke up or went[ throught] through a break-up ? No. Breakthrough and break up have very different meanings. Note: "break up" is a verb and "break-up" is a noun 38. The business is publicly owned. ( meaning ? ) The business is owned by the public. 39. It must hurt to get a shot. ( this must is like high probability ? ) Yes. When you say "it must _____," it is also similar to "it most likely _______." Note: the word "shot" can be confusing. When you say "It must hurt to get A shot, then it sounds like "It must hurt to get an injection." When you say "It must hurt to get shot," then it means "It must hurt to be shot by a gun." Hope this helps~!

37. They made an important breakthrough. ( important progress ? like in a investigation ? Yes. it can mean also a couple breaked up or went throught a break up ? No. They broke up (their relationship ended). Their breakup was a painful one. 39. "It must hurt to get a shot. ( this must is like hight probability ? Yes.

I'm not sure if I'm writing it right , I will be grateful for any help :) 37. They made an important breakthrough. Yes, important progress, they made a discovery. This phrase is often used within the sciences. When scientist discover an entirely renewable source of energy that can power all of our society, they will have made a breakthrough. It cannot mean a 'break-up' like those couples go through. 38. The business is publicly owned. When a business is publically owned, it means that the business is owned by investors who have shares /stocks in the company. 39. "It must hurt to get a shot. I am not sure I get your meaning here, but the sentence is speculating that it probably is going to hurt to get a needle injection of some kind. Hope that helps :)

37. "Breakthrough" se refiere a un logro o avance. 38. El negocio es de la propiedad del público. 39. "It must hurt.." = "Me imagino que se duele.." o "Apuesto que se duele.."