After R2 is stationary inside the ISS, it will. A get more parts, become mobile, and go outside.

B help engineers develop better future robonauts.

С be assigned specific jobs inside the ISS.

D return to a space center in Arizona for more tests.​

the sentence that contains a restrictive clause is a.they decided to meet where the band was performing

explanation:

a restrictive clause is also known as an essential clause

to and without are prepositions, so a, b, and d are prepositional phrases. the adverb phrase is c, about the surprise.

explanation:

a simple sentence must have at least one dependent clause.

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.