1. 2020 _______ the 50th anniversary of Earth Day and is the start of a critical decade in the fight to save our
planet’s health.
(A) keeps
(B) marks
(C) thrives
(D) moves
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統計: A(61), B(277), C(50), D(16), E(0) #2430750
統計: A(61), B(277), C(50), D(16), E(0) #2430750