Đọc đoạn văn và trả lời câu hỏi: where is the library of congress?

one of the world's lararies is the united states' lirary of congress . is in washington D.C, the capital of the USA. It receives copies of all Ameriacan books . It contians over 100 million books . It has about 1,000 km of shelves . It has over 5,000 employees

questions.
a) where is the library of congress ?
b) how many books does it have ?
c) how long are its shelves ?
d) how many people work there ?
e) why is it so large ?