阿摩線上測驗
48. What is the main idea of paragraph 2?
(A) Volcanic activities have been on the increase over the years.
(B) Volcanic activities are no more frequent than they used to be.
(C) Volcanic activities increase as the human population becomes larger.
(D) Scientists keep monitoring and reporting volcanic activities.
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統計： A(70), B(90), C(129), D(57), E(0) #3128976
統計： A(70), B(90), C(129), D(57), E(0) #3128976
