3. To drink clean water, one side of the straw is put into the water, and people simply drink the water from the other side. The water goes through a special fiber in a plastic tube. The fiber blocks even very small materials to prevent them from entering the mouth. In this way, the water that comes out is ___________. The materials contain several kinds of bacteria, and the straw can remove nearly 100 percent of them.
11. A: Catherine isn't sure if she should hire Andy Adams or Gina Burton. They both have a lot of experience. B: Well, in ___________, I hope she hires someone soon. We're really busy.
