問題詳情

9. Please feel free to contact our customer service center __________ any questions.
(A) if should be
(B) if there be
(C) should be there
(D) should there be

參考答案

答案:D
難度:適中0.4
統計:A(1),B(3),C(2),D(4),E(0)

內容推薦

內容推薦