3RD PHYSICS MATHEMATICS
http://www.youtube.com/watch?v=cB0tK5ZNqvU

COLLOCATIONS : DENY, REFUSE, PRODUCE, GENERATE

Which items dou think are the safest ones to protect your house?

INDEFINITE PRONOUNS

http://www.englishclub.com/grammar/pronouns-indefinite.htm

http://www.autoenglish.org/gr.anythin.i.htm