"he was the curiousest man about always betting on anything that turned up you ever see, if he could get anybody to bet on the other side; and if he couldn't change sides"
what does this mean in standard american english? plz

It means that the person was a gambler.

Explanation:

The line belongs to The Notorious Frog of Calaveras County, a short story written by Mark Twain. It narrates the story of a guy that narrates another story (called a frame story) about a guy that used to bet on everything. The person described in the story takes his actions (betting) to a point where he puts his money on a frog that had been manipulated before the bet. With this phrase, the speaker wants to express that the guy was totally a gambler.

pandas are endangered because of habitat destruction by humans.

as of 2014 there were around 2,000 left, since then, it supposedly has risen 17%.

they are a very endangered species.

-theoneandonly003

c) eager anticipation.