1letter of reference
2let…go
3let oneself in
4let sb out
5let up
6lift the ban
7light bulb
8light lunch
9light schedule
10light up
11light up
1line by line
2line up for
3listen for one's telephone
4literary criticism
5love off campus
6living room
7loving situation
8lock up
9locker room
10long distance call
11look away from
1look for a needle in a hay stack
2look forward to doing/sth.
3look into
4look on with
5look out
6look over
7look sharp
8look up(in a) dictionary
9look up to