He is _____ tearing up what he has written and beginning over again.

—Do you think an advertisement is a help when you look for a job?—Well，it depends.________，it gives me a chance to try.

I can’t say I’m the best. I have only _________ made more efforts than others.

As the idea of low-carbon life is now _____ accepted, more and more people travel by public transport.

Private cars really provide much convenience to people, and ___ they cause too many problems.