阿摩線上測驗
16.For over 2000 years, paper has been used as a major tool of communication; however, e-mail today has become a _______ practice.
(A) common
(B) difficult
(C) last
(D) traditional
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統計： A(101), B(10), C(11), D(8), E(0) #693853
統計： A(101), B(10), C(11), D(8), E(0) #693853
