Oct.1st, ______is our National Day, is always celebrated with singing and dancig.
Have you ever seen a doctor? If ______, what happened?
11. _______ on the top of the hill is a monument, dating back to hundreds of years ago.
______ the poor living conditions, they continue to gather in the suburban villages because of low rents and easy transport.
The truck ran down the hill, and the driver _____, according to the local newspaper, to have been killed.
This is not an economical way to get more water; ________, it is very expensive.