Countable and Uncountable - How much or How many ?
http://www.johnsesl.com/Projects/HowmuchorHowmany.shtml

Countable and Uncountable - C or U ?
http://a4esl.org/q/j/ck/ch-countnouns.html

Countable and Uncountable - Multiple Choice
http://a4esl.org/q/j/km/mc-noncount.html

Adverbs of Frquency - Position of Adverbs
http://www.englisch-hilfen.de/en/exercises/adverb1.htm

Adverbs of Frequency - Ordering Sentences
http://www.johnsesl.com/scrambledtxt/adverbs/