阿摩線上測驗
19. Hardly _____ the implications of the discovery when further evidence came to light.
(A) scientists had begun to consider
(B) had scientists begun to consider
(C) beginning scientists to consider
(D) begin scientists to consider
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統計： A(0), B(17), C(0), D(1), E(0) #3792852
統計： A(0), B(17), C(0), D(1), E(0) #3792852
