1.   http://www.englisch-hilfen.de/en/exercises/structures/prepositions_at_in_on_time.htm
2. http://www.englishpage.com/prepositions/time_prepositions_1.htm
3. http://www.learnenglishfeelgood.com/prepositions-of-time3.html
4. http://esl.fis.edu/vocab/q12m/RED19.htm

 

 

Filed under: Exercise Links, Grammar Tagged: at, in, on, prepositions of time
Source: Computer Lab