阿摩線上測驗
34. _____ with urban parks, riverfront trails, museums, shops, etc., Pittsburgh provides a haven for pedestrians.
(A) Littering
(B) Being littering
(C) Litter
(D) Littered
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統計： A(127), B(15), C(12), D(96), E(0) #2754288
統計： A(127), B(15), C(12), D(96), E(0) #2754288