I hope there will be ____ cars and ____ pollution in the future, thus people will live longer.
The park looks quiet and clean;we enjoy ________ for a walk.
On weekends,the supermarket is very ________.
You can’t turn right when you see the sign ________.
—Where do you sit,Jane? —I sit ________ Linda.She is just on my left.
The policeman helped the old woman walk ________ the road.