問題詳情

15. The doctor is researching for the possible cures for his son’s disease _____; he putsevery waking minute into the research.
(A) at random
(B) every now and then
(C) with all his heart
(D) before long

參考答案

答案:C
難度:適中0.642857
統計:A(1),B(8),C(27),D(3),E(0)

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