問題詳情

18.( ) Alice fell asleep as soon as her head hit the pillow. She _______ tired after all the walking.
(A) could be
(B) must have been
(C) may be
(D) should have been

參考答案

答案:B
難度:困難0.393939
統計:A(6),B(26),C(12),D(12),E(0)

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