阿摩線上測驗
111. The new irrigation system is expected to significantly increase crop_______in the arid region.
(A) fields
(B) farms
(C) yields
(D) grounds
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統計： A(53), B(15), C(73), D(6), E(0) #3823411
統計： A(53), B(15), C(73), D(6), E(0) #3823411
