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
One can fail at times, but _______ makes a difference is one’s attitude towards life.
He tried his best to solve the problem, _______ difficult it was.
With the World Cup at hand, _______ has been a heated discussion over which country the championship will go to.
---Besides being bright, he has always been working hard.--- No wonder he _______ in almost all subjects.
Only after he graduated _______ how much he loved his alma mater (母校) .