50. A: Dramatic weather changes can be seen everywhere in the world nowadays. B: _____
(A) It is an interesting case study.
(B) We should not take it lightly.
(C) The weather report says it is going to be a rainy day tomorrow.
(D) The weather changes in the high mountain areas every few hours.
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統計: A(54), B(261), C(119), D(93), E(0) #3445998
統計: A(54), B(261), C(119), D(93), E(0) #3445998