Dream of the Red Chamber is ________worth ________because we can learn a lot about the noble families in the feudal society.
---Excuse me, Dad, but I am going to the club to meet my friends in the football team. ---OK.
It is well known to us all that a lot of rivers _______by factories.
I feel ____to have been invited to give a speech here.
It was along the Mississippi Rever ____Mark Twain spent much of his childhood.
--Why did the police ______________the crowd? ---Because the president’s car __________in the street.