Choose the correct answer

5
Garlic being sold as organic was found to contain
pesticide and was removed from the market.
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a elements
c residues
b
filaments
d variables
6
A well-known
journalist uncovered secret
documents relating to high levels of lead in
household water supplies.
a investigative
c extensive
b observant
d accurate
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7 Scientists believe that procreation from a diverse
creates stronger, taller and more intelligent offspring.
a nervous system
c gene pool
b growth hormone
d ecosystem
8
When temperatures drop
down into the soil to survive.
a minus
c under
freezing, frogs burrow
b
less
d below