阿摩線上測驗
12. Why is water becoming harder to obtain?
(A) Because there is no water on Earth
(B) Because all water is polluted
(C) Because only a small amount is usable freshwater
(D) Because people do not need water
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統計： A(0), B(0), C(5), D(0), E(0) #4032053
統計： A(0), B(0), C(5), D(0), E(0) #4032053
