The development of industry has been _____ gradual process throughout _____ human existence, from stone tools to modern technology.
He had never envied the rich___money.
The young often___the old in our town.
_____a wonderful sense of humour.
—Do you think we can get there on time? —Yes,_________ the bus does not break down. A.even if .unless C.until D.so long as
It wasn’t ________ they found that there was much trouble ________ the plan.