She offered me practical __________ with my research, for which I would appreciate for my whole life.
_______ very high speed, the rocket rushed into the air and soon disappeared.
If you had finished your homework yesterday, you _____ home now.
_____ doesn’t seem to have been any trouble in solving the problem.
Is it in the factory ______ you visited last week ______ this kind of car is made?
________ that I was a regular visitor, the servant let me in.