問題詳情
43. On the average, a healthy heart ______ to pump five tablespoons of blood with every beat.
(A)can
(B)must
(C)ought
(D)should三、會話測驗
(A)can
(B)must
(C)ought
(D)should三、會話測驗
參考答案
答案：C
難度：適中0.607143
統計：A(3),B(7),C(34),D(6),E(0)
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