23．When you get the paper back, pay special attention to what _______

問題詳情

23．When you get the paper back, pay special attention to what ________ .
(A)have marked
(B) have been marked
(C)had marked
(D)had been marked

答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)