He _____ some signs asking for old books.

We don’t know who ____ for the murder, but the policemen will tell us the truth soon.[ ]

There is no such place ________ you dream of in all this world.

u building, _____ a history of more than 700 years, is well-known for its magnificent appearance the quiet and natural surroundings.

There are still many old city walls in Xi’an,_______—Yes, there are.