One of the sides of the board should be painted yellow, and ______. .
If we had taken such effective measures much earlier, the river ________ so seriously now.
More and more attention has been drawn to the fact that many children are ________ in the countryside when their parents flood into the cities for jobs.
--How did you find your visit to Qingdao, Joanna? --________.
Mr. Black ________ for Shanghai in a few days. Do you know when the earliest plane ________ on Sunday?
To pay to see that movie seems foolish ________ you can see it on television for free.