Standard answer: mouth. The frog should open its mouth first, which is the result of deducing the order in which things happened. First of all, the frog's mouth is still when he is watching TV, so he must open his mouth first if he wants to speak. Second, from the "knocked on the door seven times" and "the original", we can see that the frog did not know that his friends would come, not to mention who knocked on the door.

So, after the frog hears seven knocks on the door, he must open his mouth to ask who is knocking on the door before he opens the door and finally realizes that it is his good friend who has brought a surprise breakfast.

But there are other answers, such as the frog is the first to open the eyes, but the correct should be mosquitoes, know that is a friend to come, indicating that the eyes have been opened, then has opened the door so that you know what is inside the food, but also do not have to open the package, because surprisingly know that the inside of the food indicates that the package is also open, then you have seen the frog eat chocolate pie or something, of course, will choose mosquitoes.

WeChat circle of friends in the recent many users are playing and a small potatoes played a childish game If you guessed wrong, you have to put your avatar 24 hours into! Problem:There is a green frog at 7 am still watching TV, suddenly a man knocked on the door 7 times . It turned out to be that frog's best friend who brought a surprise breakfast.

He brought 7 of the frog's favorite things chocolate pie, cheese, chocolate candy, bread, fried rice, milk, and live flies! What do you think the frog should open first. It's easy, but many people guessed wrong.