It was a serious mistake, ______ caused by carelessness. 

As far as I see, _______ is no possibility _________ he will win the tennis match this time.

Since there’s no more work to do, we might just ________ go home. 

.He arrived in Hollywood in 1964,____some time later,he became a foamous actor.

— Should people stop using their cars and start using public transport?— __________. The roads are too crowded as it is.