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­¡Cereals,flour,and flour product are examples of foods that are often (enriched).

a. given money b. given vitamins c. made more expensive d. processed ­¢Every measurement contains an error because the eye and hand are not (precise).

a.exact
b.steady
c.reliable
d.trained

­£But the fact that Earth is unique in the solar system does not mean it is (unique) in our galaxy.

a.alone
b.a part
c.certainly
d.unlike anything else

­¤Vitamins and minerals do not supply energy but help (regulate) body functions.

a.control
b.enable
c.make more common
d.measure
­¥The energy of the sea is a large amount,but it is not (available to) us.

a.for sale to
b.readey for use by
c.safe for use by
d.useful to

­¦Sometimes atoms joined to form a bigger,more ¡Êcomplex ¡Ë compounds,

a.complicated
b.gigantic
c.interesting
d.whole