The Ching Ming Festival or Grave-Sweeping Day, ____ falls on April 4 this year, is an important date in the Chinese calendarA. which B that C. what D. where
_______you study hard,you’ll succeed in time.
He tried his best to solve the problem,________difficult it was.
Measures have been taken to prevent the river from____.
Children often display an________curiosity about every new thing they encounter.
___________in reality,the story is popular with adults.