阿摩線上測驗
6 Elevated wood-plank bridges are used to separate _____ and vehicle traffic, and to provide beautiful views of the treetops.
(A) pedestrian
(B) non-stop
(C) commercial
(D) off-peak
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統計： A(41), B(4), C(6), D(5), E(0) #3412371
統計： A(41), B(4), C(6), D(5), E(0) #3412371
