McDougall on barefoot running

Here is the link for Christopher McDougall's TED talk Sebastien mentioned today.  For those of you who have never used the TED website, it could be a good introduction.  Try the interactive transcript and/or subtitle tools.

Prepositions

Basic prepositions:
Here you can find some exercises on basic prepositions.  The key to the exercises is hereby made available. (Source: English Grammar in Use: Intermediate by Raymond Murphy) 

Noun, adjective and verb + preposition:
Here you can find some exercises on nouns, adjectives and verbs which are used with certain prepositions.  The key for the exercises are also hereby made available. (Source: English Grammar in Use: Intermediate by Raymond Murphy)

Phrasal verbs:
Here you can find some exercises on phrasal verbs.  The key to the exercises is hereby made available. (Source: English Grammar in Use: Intermediate by Raymond Murphy)