6. Global warming is causing lots of natural                 all over the world.
(A) resources
(B) preventions
(C) explorations
(D) calamities

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統計: A(2), B(0), C(1), D(21), E(0) #2352484

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#5705216
(A) resource 資源(B) p...
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#4532976
6. Global warming is...
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