Hesetupinbusiness（）hisownandwasverysuccessful.

I never regretted _____ his offer, for it was not where my interest lay.

Ifnot_____withtherespecthefeelsduetohim,Jackgetsveryill-temperedandgrumblesallthetime.

It’s high time we _____ cutting down the rainforests.

The country’s chief exports are coal, cars and cotton goods, cars _____ the most important of these.