阿摩線上測驗
47. In the 1960s, the computer network _____________.
(A) had few problems
(B) had a lot of problems
(C) was good enough to be used
(D) was already used by millions of people
(E) was not set up yet
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統計： A(31), B(312), C(25), D(19), E(35) #1961118
統計： A(31), B(312), C(25), D(19), E(35) #1961118
