To practise the Present simple:
http://www.slideshare.net/pepamut/the-present-simple-with-the-simpsons
The Past Simple in affirmative:
http://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?04
The Past Simple negative:
http://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?05
This link for the questions:
http://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?06
READING COMPREHENSION: Read and do the exercises online
Nasreddin and the Smell of soup: http://web2.uvcs.uvic.ca/elc/studyzone/330/reading/smell1.htm