2. The more trees, rivers, birds and animals we are surrounded by, the more______
that environment will be for our health.
(A)Advanced
(B) Beneficial
(C)Improved
(D)Valuable
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統計: A(1), B(2), C(1), D(0), E(0) #2842971
統計: A(1), B(2), C(1), D(0), E(0) #2842971