When products made in factories _____, they are thrown away as garbage.
As the president’s car appeared, the waiting crowds ______ loud cheers.
After the new method is _______, a lot of money will be saved.
He went down into the cold water and after ________seemed a long time, he came out.
Who is ______ you want to send to the front?
With two children ___middle school in the nearby town now, the parents are working hard.