阿摩線上測驗
6 The slow-moving train cuts through endless ______ of terrain, most of which being flat and monotonous.
(A) supplies
(B) expanses
(C) numerals
(D) outlines
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統計： A(2), B(14), C(1), D(12), E(0) #2771261
統計： A(2), B(14), C(1), D(12), E(0) #2771261
