Tokyo, the capital of Japan, is a big city. The city is filled with factories, large office buildings, banks, restaurants, and shops of all sizes. It is a (1)_________ for Japanese art, and is home to more than 100 colleges and universities. The city is (2) ________ an important seaport. Most Janpanese companies have (3) _________ main offices in Tokyo. At the heart of Tokyo. At the heart of Tokyo is the Imperial Palace. This is the place (4) ________ the Emperor of Japan lives with his family. Tokyo is one of the world's biggest and most crowded (5)_______ .   
1.A.house      B. city      C.centre       D. capital
2    .A.and        B.also       C.but        D.so
3      .A.its       B.their      C.thiers      D.some
 4.     A.what      B.where      C.which      D.for
5.       A.city      B.a city        C.cities     D.the cities