We should preserve the _____ we live on. After all, there is only one earth.
(A)planet
(B)ketchup
(C)dumpling
(D)value
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統計: A(1935), B(95), C(107), D(169), E(0) #325407
統計: A(1935), B(95), C(107), D(169), E(0) #325407