Clearly, in a system _________ every decision is made on the basis of tradition alone, it may be difficult to achieve progress.
If we work with a strong will, we can overcome any difficulty, _____great it is.
--- My son is _____ to be seen. Where has he gone? --- I think he _____ in the building.
His grandfather was among the first to settle in _____ is now a famous holiday center.
No sooner _____ to sleep than the telephone rang once more.
You should take _____ of this opportunity and try to make a good impression on them.