On the placement of Adverbs of Frequency:

Second Part:
2. http://www.ego4u.com/en/cram-up/grammar/simple-present/use/exercises?02

3. http://web2.uvcs.uvic.ca/elc/studyzone/330/grammar/pres1.htm

4. http://www.englishexercises.org/makeagame/viewgame.asp?id=2272

5. http://www.macmillaninspiration.com/original/files/2010/07/INSP1_ws3.pdf