1jazz club
2jazz record
3just a minute
4keep an eye (out) on (sth.) (for sb.)
5keep an eye on
6keep current on
7keep doing sth.
8keep in shape
9keep it between the two of us
10keep on
11keep sb. from doing sth.
12keep one's opinions to oneself
1keep to oneself
2keep track of
3keep up
4keep up with
5kill time
6knock oneself out on sth.
7know a thing or two lab hour
8lab hour
9lab report
10language lab
11language laboratory
12laundry detergent
1law school
2lay off
3learn the ropes
4leave…up to sb.
5leave for someplace
6leave no stone unturned
7leave well enough alone
8leave…around
9lecture hall
10left over
11leg injury