43. Why is the polar bear taken as the theme for this year’s structure?
(A) It’s cool.
(B) It’s in grave danger.
(C) It’s of significant value.
(D) It’s snow-white.

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統計： A(67), B(21), C(22), D(11), E(0) #573419

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43.【題組】43. Why is th...
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