阿摩線上測驗
20. The author’s conclusions rest on assumptions that, if _____ unexamined, could undermine the entire analysis.
(A) left
(B) leaving
(C) having left
(D) was left
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統計： A(11), B(9), C(5), D(1), E(0) #3792853
統計： A(11), B(9), C(5), D(1), E(0) #3792853
