If statement contains one or more if statements called if statement nesting.

Matreshka doll also known as a Russian nesting doll or a babushka doll.

Matryoshka dolls, also known as nesting dolls or Russian dolls (俄罗斯套娃), are often used to interpret the concept of hierarchy.

Politics are to bribe as ______. () A: nesting is to leaving B: painting is to commission C: parking is to meter D: business is to contract E: examinations are to cheat

中国大学MOOC: The following exercises will help you gain greater understanding about how prepositional phrases work. Choose the best answer to complete each sentence.There are lots of birds nesting _____________________.

According to the author, all of-the following evidence relating to the first birds was found EXCEPT（） A: nesting materials B: four skeletons in good condition C: two fragmented skeletons D: a single feather