INTERMEDIATE LEVEL - 2

1- GRAMMAR:
-Revise the English verbal tenses in the following link:
http://www.ego4u.com/en/cram-up/grammar/tenses
-Revise prepositions as well here and don't forget to do exercises that you find at the back of the page:
http://www.ego4u.com/en/cram-up/grammar/prepositions
2-READING:
-Do you like siesta? Read the following article and try it:
http://www.guardian.co.uk/science/2010/feb/21/naps-improve-learning-ability