The Great Wall istourist attraction that millions of people pour in every year.
so a well-known
a so well-known
such well-known
such a well-known
Shortly after the book Uncle Tom's Cabin________, the Civil War of America________.
—When will the game begin?—It will begin later than usual _________ 15 minutes.
Some areas, ____ their severe weather conditions, are hardly populated.
_________ a lot of troublesome affairs to deal with,our boss doesn't have any time to spend holidays.
_______, you can gently improve your spoken English in a short time.