48. According to the passage, why do people chew gum?
(A) To get to sleep easily.
(B) To eat less junk food.
(C) To attract the opposite sex.
(D) To sell old gum as canvases.
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統計: A(41), B(299), C(55), D(52), E(0) #1584455
統計: A(41), B(299), C(55), D(52), E(0) #1584455