these trials, people are ________assigned to a "treatment" group, which benefits from the project, and a "control" group, which does not.
Can you make sure ______ the gold ring?
It is careless _______ such a mistake.
The teacher said that the sun ________ in the east and ________ in the west.
I’d appreciateif you could turn the radio down. I’m doing my homework.
We had ______ fun at Mary’s party last Sunday.