these trials, people are ________assigned to a "treatment" group, which benefits from the project, and a "control" group, which does not.
Bob ____ that he had stolen the money.
He stopped and turned around _____.
Mr. Smith, I often hear people say DVD, but I never know what they really mean. Would you tell me what DVD ____?
There are altogether 6 people in the room, the baby____.
What great trouble we had ____ where his house was.