19. The girl plays the flute smoothly. She must _______ it.(A) has learned (B) learned (C) have lear

問題詳情

19. The girl plays the flute smoothly. She must _______ it.
(A) has learned
(B) learned
(C) have learned
(D) have been learned

答案：C
難度：適中0.422535
統計：A(23),B(11),C(30),D(7),E(0)