"the hurricane demolished houses in its path" "the track of an animal" "the course of the river"
"the police are following a promising lead" "the trail led straight to the perpetrator"
"he played the first cut on the cd" "the title track of the album"
"track mud into the house"
"track a missile"
"The policeman chased the mugger down the alley" "the dog chased the rabbit"
"The caravan covered almost 100 miles each day"
误 We must read the papers so as to keep track with world affairs.
正 We must read the papers so as to keep track of world affairs.
析 keep track of是固定用法,介词of不能改为with。