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—Look, what an old palace! It looks so great!

—Yeah, it ______ nearly 800 years ago.

A．was building         B．was built        C．has built           D．is built

--- Look, what an old palace! It looks so great!

   --- Yeah, it ______ nearly 800 years ago.

       A. was building          B. was built               C. has built                D. is built

–Look, what an old palace! I t looks so great!

-Yeah, it ______nearly 800 years ago.

　 A. build　　 B. was built　　 C. had built