these trials, people are ________assigned to a "treatment" group, which benefits from the project, and a "control" group, which does not.
After _______, jack hurried to work.
----- I’d like to invite you to dinner this Saturday, Mr smith. -----________.
Have you _____ the book yet?
They will be very _____ to see you here.
What about the two of us _____ a walk after supper?