—Recent pressure at work may ______ his behavior.
Peter’ shirt looked just the same as Tom’s,but it cost ______ his.
We can’t figure out ______ quite a number of insects and birds are dying out.
______ environmental damage is done,it takes many years for the ecosystem to recover.
If Susan ______ for ten more minutes at the party last night, she might have met Johnny Depp, the famous Hollywood star.
Passers-by rescued a motorcycle driver ______ under a burning car.