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請問第17題

第 16 至20 題為題組
The fruits and vegetables we eat often come in distinctive colors. The rich colors, 16 are not
there only to attract attention. They perform another important function for the plants.
Research shows that the substances 17 these colors actually protect plants from chemical
damage. The colors come mainly from chemicals known as antioxidants. Plants make antioxidants to
protect themselves from the sun's ultraviolet (UV) light, 18 may cause harmful elements to form
within the plant cells.
When we eat colorful fruits and vegetables, the coloring chemicals protect us, too. Typically, an
intensely colored plant has 19 of these protective chemicals than a paler one does. Research on how
chemicals in blueberries affect brain function even suggests that these chemicals may help our own brains
work more
20 In other words, eating richly colored fruits and vegetables makes us both healthier
and smarter.
16. (A) almost
(B) rarely
(C) however
(D) relatively
17. (A) capable of
(B) different from (C) inferior to
(D) responsible for