46. What is the main purpose of the first paragraph?
(A) To persuade people to use less plastic.
(B) To explain how microplastics come along.
(C) To introduce a new creation called microplastics.
(D) To show people how important microplastics are.
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統計: A(17), B(78), C(21), D(5), E(0) #3426375
統計: A(17), B(78), C(21), D(5), E(0) #3426375